Korean Patent Application No. 10-2014-0170824, filed on Dec. 2, 2014, in the Korean Intellectual Property Office, and entitled: “Condensed-Cyclic Compound and Organic Light-Emitting Device Including The Same,” is incorporated by reference herein in its entirety.
1. Field
Embodiments relate to a condensed-cyclic compound and an organic light-emitting device including the same.
2. Description of the Related Art
Organic light-emitting devices (OLEDs) are self-emission devices that have wide viewing angles, high contrast ratios, quick response times, high luminance, and excellent driving voltage characteristics, and can produce full-color images.
An organic light-emitting device may include a first electrode disposed on a substrate, and a hole transport region, an emission layer, an electron transport region, and a second electrode, which are sequentially disposed on the first electrode. Holes provided from the first electrode are transported to the emission layer through the hole transport region, and electrons provided from the second electrode are transported to the emission layer through the electron transport region. Carriers, such as the holes and electrons, may recombine in the emission layer to generate excitons. When the excitons drop from an excited state to a ground state, light is emitted.
Embodiments are directed to condensed cyclic compound represented by Formula 1:
R1 to R12 are each independently selected from a group represented by Formula 2, a group represented by Formula 3, a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a substituted or unsubstituted C1-C60 alkyl group, a substituted or unsubstituted C2-C60 alkenyl group, a substituted or unsubstituted C2-C60 alkynyl group, a substituted or unsubstituted C1-C60 alkoxy group, a substituted or unsubstituted C3-C10 cycloalkyl group, a substituted or unsubstituted C1-C10 heterocycloalkyl group, a substituted or unsubstituted C3-C10 cycloalkenyl group, a substituted or unsubstituted C1-C10 heterocycloalkenyl group, a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C6-C60 aryloxy group, a substituted or unsubstituted C6-C60 arylthio group, a substituted or unsubstituted C1-C60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, and —Si(Q1)(Q2)(Q3);
at least one of R1 to R12 is a group represented by Formula 2, and at least one of R1 to R12 is a group represented by Formula 3;
wherein, in Formulae 2 to 3,
L1 and L2 are each independently selected from a substituted or unsubstituted C3-C10 cycloalkylene group, a substituted or unsubstituted C1-C10 heterocycloalkylene group, a substituted or unsubstituted C3-C10 cycloalkenylene group, a substituted or unsubstituted C1-C10 heterocycloalkenylene group, a substituted or unsubstituted C6-C60 arylene group, a substituted or unsubstituted C1-C60 heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group;
a1 and a2 are each independently selected from 0, 1, 2, and 3; when a1 is 2 or greater, two or more L1s are identical to or different from each other, and, when a2 is 2 or greater, two or more L2s are identical to or different from each other;
Ar1 to Ar4 are each independently selected from a substituted or unsubstituted C3-C10 cycloalkyl group, a substituted or unsubstituted C1-C10 heterocycloalkyl group, a substituted or unsubstituted C3-C10 cycloalkenyl group, a substituted or unsubstituted C1-C10 heterocycloalkenyl group, a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C1-C60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group;
Ar1 and Ar2 are optionally linked to each other and form a saturated or unsaturated ring, and Ar3 and Ar4 are optionally linked to each other and form a saturated or unsaturated ring;
wherein, in Formulae 1 to 3, at least one substituent of the substituted C3-C10 cycloalkylene group, substituted C1-C10 heterocycloalkylene group, substituted C3-C10 cycloalkenylene group, substituted C1-C10 heterocycloalkenylene group, substituted C6-C60 arylene group, substituted C1-C60 heteroarylene group, substituted divalent non-aromatic condensed polycyclic group, substituted divalent non-aromatic condensed heteropolycyclic group, substituted C1-C60 alkyl group, substituted C2-C60 alkenyl group, substituted C2-C60 alkynyl group, substituted C1-C60 alkoxy group, substituted C3-C10 cycloalkyl group, substituted C1-C10 heterocycloalkyl group, substituted C3-C10 cycloalkenyl group, substituted C1-C10 heterocycloalkenyl group, substituted C6-C60 aryl group, substituted C6-C60 aryloxy group, substituted C6-C60 arylthio group, substituted C1-C10 heteroaryl group, substituted monovalent non-aromatic condensed polycyclic group, and substituted monovalent non-aromatic condensed heteropolycyclic group is selected from:
a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, and a C1-C60 alkoxy group;
a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, and a C1-C60 alkoxy group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, and —Si(Q11)(Q12)(Q13);
a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group;
a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, and —Si(Q21)(Q22)(Q23); and
—Si(Q31)(Q32)(Q33),
wherein Q1 to Q3, Q11 to Q13, Q21 to Q23, and Q31 to Q33 are each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group.
According to one or more exemplary embodiments, an organic light-emitting device includes a first electrode; a second electrode facing the first electrode; and an organic layer that is between the first electrode and the second electrode and includes an emission layer. The organic layer includes the condensed cyclic compound as described above.
Features will become apparent to those of skill in the art by describing in detail exemplary embodiments with reference to the attached drawings in which:
Example embodiments will now be described more fully hereinafter with reference to the accompanying drawings; however, they may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey exemplary implementations to those skilled in the art.
In the drawing figures, the dimensions of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when a layer or element is referred to as being “on” another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may also be present. Further, it will be understood that when a layer is referred to as being “between” two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present. Like reference numerals refer to like elements throughout.
As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. Expressions such as “at least one of,” when preceding a list of elements, modify the entire list of elements and do not modify the individual elements of the list.
A condensed-cyclic compound may be represented by Formula 1 below:
In Formula 1, R1 to R12 may be each independently selected from a group represented by Formula 2, a group represented by Formula 3, a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a substituted or unsubstituted C1-C60 alkyl group, a substituted or unsubstituted C2-C60 alkenyl group, a substituted or unsubstituted C2-C60 alkynyl group, a substituted or unsubstituted C1-C60 alkoxy group, a substituted or unsubstituted C3-C10 cycloalkyl group, a substituted or unsubstituted C1-C10 heterocycloalkyl group, a substituted or unsubstituted C3-C10 cycloalkenyl group, a substituted or unsubstituted C1-C10 heterocycloalkenyl group, a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C6-C60 aryloxy group, a substituted or unsubstituted C6-C60 arylthio group, a substituted or unsubstituted C1-C60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, and —Si(Q1)(Q2)(Q3).
In Formula 1, at least one of R1 to R12 may be a group represented by Formula 2 below, and at least one of R1 to R12 may be a group represented by Formula 3 below.
In Formulae 2 and 3,
L1 and L2 may be each independently selected from a substituted or unsubstituted C3-C10 cycloalkylene group, a substituted or unsubstituted C1-C10 heterocycloalkylene group, a substituted or unsubstituted C3-C10 cycloalkenylene group, a substituted or unsubstituted C1-C10 heterocycloalkenylene group, a substituted or unsubstituted C6-C60 arylene group, a substituted or unsubstituted C1-C60 heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group.
In some embodiments, in Formulae 2 and 3, L1 and L2 may be each independently selected from:
a phenylene group, a pentalenylene group, an indenylene group, a naphthylene group, an azulenylene group, a heptalenylene group, an indacenylene group, an acenaphthylene group, a fluorenylene group, a spiro-fluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenalenylene group, a phenanthrenylene group, an anthracenylene group, a fluoranthenylene group, a triphenylenylene group, a pyrenylene group, a chrysenylene group, a naphthacenylene group, a picenylene group, a perylenylene group, a pentaphenylene group, a hexacenylene group, a pentacenylene group, a rubicenylene group, a coronenylene group, an ovalenylene group, a pyrrolylene group, a thiophenylene group, a furanylene group, an imidazolylene group, a pyrazolylene group, a thiazolylene group, an isothiazolylene group, an oxazolylene group, an isoxazolylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, an isoindolylene group, an indolylene group, an indazolylene group, a purinylene group, a quinolinylene group, an isoquinolinylene group, a benzoquinolinylene group, a phthalazinylene group, a naphthyridinylene group, a quinoxalinylene group, a quinazolinylene group, a cinnolinylene group, a carbazolylene group, a phenanthridinylene group, an acridinylene group, a phenanthrolinylene group, a phenazinylene group, a benzoimidazolylene group, a benzofuranylene group, a benzothiophenylene group, an isobenzothiazolylene group, a benzoxazolylene group, an isobenzoxazolylene group, a triazolylene group, a tetrazolylene group, an oxadiazolylene group, a triazinylene group, a dibenzofuranylene group, a dibenzothiophenylene group, a benzocarbazolylene group, a dibenzocarbazolylene group, a thiadiazolylene group, an imidazopyridinylene group, and an imidazopyrimidinylene group; and
a phenylene group, a pentalenylene group, an indenylene group, a naphthylene group, an azulenylene group, a heptalenylene group, an indacenylene group, an acenaphthylene group, a fluorenylene group, a spiro-fluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenalenylene group, a phenanthrenylene group, an anthracenylene group, a fluoranthenylene group, a triphenylenylene group, a pyrenylene group, a chrysenylene group, a naphthacenylene group, a picenylene group, a perylenylene group, a pentaphenylene group, a hexacenylene group, a pentacenylene group, a rubicenylene group, a coronenylene group, an ovalenylene group, a pyrrolylene group, a thiophenylene group, a furanylene group, an imidazolylene group, a pyrazolylene group, a thiazolylene group, an isothiazolylene group, an oxazolylene group, an isoxazolylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, an isoindolylene group, an indolylene group, an indazolylene group, a purinylene group, a quinolinylene group, an isoquinolinylene group, a benzoquinolinylene group, a phthalazinylene group, a naphthyridinylene group, a quinoxalinylene group, a quinazolinylene group, a cinnolinylene group, a carbazolylene group, a phenanthridinylene group, an acridinylene group, a phenanthrolinylene group, a phenazinylene group, a benzoimidazolylene group, a benzofuranylene group, a benzothiophenylene group, an isobenzothiazolylene group, a benzoxazolylene group, an isobenzoxazolylene group, a triazolylene group, a tetrazolylene group, an oxadiazolylene group, a triazinylene group, a dibenzofuranylene group, a dibenzothiophenylene group, a benzocarbazolylene group, a dibenzocarbazolylene group, a thiadiazolylene group, an imidazopyridinylene group, and an imidazopyrimidinylene group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclopentenyl group, a cyclohexenyl group, a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group.
In some embodiments, in Formulae 2 and 3, L1 and L2 may be each independently selected from groups represented by Formulae 3-1 to 3-33 below:
In Formulae 3-1 to 3-33,
Y1 may be selected from O, S, C(Z3)(Z4), N(Z5), and Si(Z6)(Z7);
Z1 to Z7 may be each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group.
d1 may be an integer selected from 1 to 4, d2 may be an integer selected from 1 to 3, d3 may be an integer selected from 1 to 6, d4 may be an integer selected from 1 to 8, d5 may be an integer of 1 or 2, d6 may be an integer selected from 1 to 5, and * and *′ may each independently be a binding site to a neighboring atom.
In another embodiment, in Formulae 2 and 3, L1 and L2 may be each independently selected from groups represented by Formulae 4-1 to 4-29 below:
In Formulae 4-1 to 4-29, * and *′ may be each independently a binding site to a neighboring atom.
In Formulae 2 and 3, a1 and a2 may be each independently selected from 0, 1, 2, and 3. In Formula 2, a1 denotes the number of L1s. When a1 is 2 or greater, two or more L1s may be identical to or different from each other. When a1 is 0. *-(L1)a1-*′ is a single bond. In Formula 3, a2 denotes the number of L2s. When a2 is 2 or greater, two or more L2s may be identical to or different from each other. When a2 is 0, *-(L2)a2-*′ is a single bond. In some embodiments, a1 and a2 may be each independently 0, 1, or 2. In some embodiments, a1 and a2 may be each independently 0 or 1.
In Formulae 2 and 3, Ar1 to Ar4 may be each independently selected from a substituted or unsubstituted C3-C10 cycloalkyl group, a substituted or unsubstituted C1-C10 heterocycloalkyl group, a substituted or unsubstituted C3-C10 cycloalkenyl group, a substituted or unsubstituted C1-C10 heterocycloalkenyl group, a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C1-C60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group.
In some embodiments, in Formulae 2 and 3, Ar1 to Ar4 may be each independently selected from:
a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a dibenzosilolyl group, a thiadiazolyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group; and
a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a dibenzosilolyl group, a thiadiazolyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclopentenyl group, a cyclohexenyl group, a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, and —Si(Q31)(Q32)(Q33),
wherein Q31 to Q33 may be each independently selected from a C1-C10 alkyl group, a C1-C10 alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a phenanthrolinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a dibenzosilolyl group, a thiadiazolyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group.
In some embodiments, in Formulae 2 and 3, Ar1 to Ar4 may be each independently selected from:
a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group; and
a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C10 alkyl group, a C1-C10 alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, and —Si(Q31)(Q32)(Q33),
wherein Q31 to Q33 may be each independently selected from a C1-C10 alkyl group, a C1-C10 alkoxy group, a phenyl group, and a naphthyl group.
In some embodiments, in Formulae 2 and 3, Ar1 to Ar4 may be each independently selected from:
a phenyl group, a naphthyl group, a fluorenyl group, a phenanthrenyl group, a pyridinyl group, a pyrimidinyl group, a triazinyl group, a dibenzofuranyl group, and a dibenzothiophenyl group; and
a phenyl group, a naphthyl group, a fluorenyl group, a phenanthrenyl group, a pyridinyl group, a pyrimidinyl group, a triazinyl group, a dibenzofuranyl group, and a dibenzothiophenyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C10 alkyl group, a C1-C10 alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a phenanthrenyl group, a pyridinyl group, a pyrimidinyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, and —Si(Q31)(Q32)(Q33),
wherein Q31 to Q33 may be each independently selected from a C1-C10 alkyl group, a C1-C10 alkoxy group, a phenyl group, and a naphthyl group.
In some embodiments, in Formulae 2 and 3, Ar1 and Ar2 may be optionally linked to each other to form a saturated or unsaturated ring, and Ar3 and Ar4 may be optionally linked to each other to form a saturated or unsaturated ring.
In some embodiments, in Formula 2, Ar1 and Ar2 or Ar3 and Ar4 may be directly linked to each other or may be linked to each other via a linking group (e.g. a C1-C5 alkylene group) therebetween to form a saturated or unsaturated ring.
In some embodiments, in Formulae 2 and 3,
Ar1=Ar2=Ar3=Ar4;
Ar1=Ar3, Ar2=Ar4, and Ar2≠Ar3;
Ar1=Ar2, Ar3=Ar4, and Ar1≠Ar3; or
Ar1≠Ar2≠Ar3≠Ar4.
In Formula 1, R1 to R12 may be each independently selected from:
a group represented by Formula 2, a group represented by Formula 3, a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl group, and a C1-C20 alkoxy group:
a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group;
a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C10 alkyl group, a C1-C10 alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, and —Si(Q31)(Q32)(Q33); and
—Si(Q1)(Q2)(Q3),
wherein Q1 to Q3 and Q31 to Q33 may be each independently selected from a C1-C10 alkyl group, a C1-C10 alkoxy group, a phenyl group, and a naphthyl group.
In some embodiments, in Formula 1, R1 to R12 may be each independently selected from:
a group represented by Formula 2, a group represented by Formula 3, a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C10 alkyl group, and a C1-C10 alkoxy group;
a phenyl group, a naphthyl group, a pyridinyl group, a pyrimidinyl group, and a triazinyl group;
a phenyl group, a naphthyl group, a pyridinyl group, a pyrimidinyl group, and a triazinyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C10 alkyl group, a C1-C10 alkoxy group, a phenyl group, a naphthyl group, a pyridinyl group, a pyrimidinyl group, a triazinyl group, and —Si(Q31)(Q32)(Q33); and
—Si(Q1)(Q2)(Q3),
wherein Q1 to Q3 and Q31 to Q33 may be each independently selected from a C1-C10 alkyl group, a C1-C10 alkoxy group, a phenyl group, and a naphthyl group.
In some embodiments, in Formulae 2 and 3,
Ar1 to Ar4 may be each independently selected from groups represented by Formulae 5-1 to 5-17 below, and
R1 to R12 may be each independently selected from a group represented by Formula 2, a group represented by Formula 3, a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group. —Si(Q1)(Q2)(Q3), and groups represented by Formulae 5-1 to 5-17 below, wherein Q1 to Q3 may be each independently selected from a C1-C10 alkyl group, a C1-C10 alkoxy group, a phenyl group, and a naphthyl group:
In Formulae 5-1 to 5-17,
Y31 may be O, S, C(Z33)(Z34), N(Z35), or Si(Z36)(Z37);
Z31 to Z37 may be each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group,
e1 may be an integer selected from 1 to 5, e2 may be an integer selected from 1 to 7, e3 may be an integer selected from 1 to 3, e4 may be an integer selected from 1 to 4, e5 may be an integer of 1 or 2, e6 may be an integer selected from 1 to 6, and * may be a binding site to a neighboring atom.
In some embodiments, in Formulae 2 and 3,
Ar1 to Ar4 may be each independently selected from groups represented by Formulae 6-1 to 6-31 below, and
R1 to R12 may be each independently selected from a group represented by Formula 2, a group represented by Formula 3, a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, —Si(Q1)(Q2)(Q3), a phenyl group, a naphthyl group, a pyridinyl group, a pyrimidinyl group, and a triazinyl group, wherein Q1 to Q3 may be each independently selected from a C1-C10 alkyl group, a C1-C10 alkoxy group, a phenyl group, and a naphthyl group:
In Formulae 6-1 to 6-31, * is a binding site to a neighboring atom.
In Formula 1, one of two substituents among R1 to R12 may be a group represented by Formula 2 and the other may be a group represented by Formula 3.
In some embodiments, the condensed cyclic compound represented by Formula 1 may be represented by one of Formulae 1-1 to 1-4:
In Formulae 1-1 to 1-4, L1, L2, a1, a2, Ar1 to Ar4, and R1 to R12 may be understood by referring to the descriptions provided herein.
In some embodiments, in Formulae 1-1 to 1-4, L1 and L2 may be each independently selected from groups represented by Formulae 4-1 to 4-29 above, and Ar1 to Ar4 may be each independently selected from groups represented by Formulae 6-1 to 6-31 above.
In some embodiments, the condensed cyclic compound represented by Formula 1 may be represented by one of Formulae 1-1(1) to 1-1(4):
In Formulae 1-1(1) to 1-1(4), L1, L2, Ar1 to Ar4, R2 to R5, and R7 to R12 may be understood by referring to the descriptions provided herein.
In some embodiments, the condensed cyclic compound represented by Formula 1 may be represented by one of Formulae 1-1(1)A to 1-1(4)D:
In Formulae 1-1(1)A to 1-1(4)D, L1, L2, and Ar1 to Ar4 may be understood by referring to the descriptions provided herein, and R3 and R8 may be each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group. —Si(Q1)(Q2)(Q3), a phenyl group, a naphthyl group, a pyridinyl group, a pyrimidinyl group, and a triazinyl group, wherein Q1 to Q3 may be each independently selected from a C1-C10 alkyl group, a C1-C10 alkoxy group, a phenyl group, and a naphthyl group.
In some embodiments, the condensed cyclic compound represented by Formula 1 may be one of Compounds 1 to 57:
The condensed cyclic compound represented by Formula 1 may have improved light-emitting characteristics, light-emission efficiency, and lifespan characteristics by including a core represented by Formula 1′ below.
The condensed-cyclic compound represented by Formula 1 may be synthesized by using a suitable organic synthesis method. A method of synthesizing the condensed-cyclic compound may be understood to one of ordinary skill in the art by referring to examples used herein.
At least one of the condensed-cyclic compounds represented by Formula 1 may be used between a pair of electrodes in an organic light-emitting device. In some embodiments, the condensed cyclic compound may be included in the hole transport region, for example, the hole transport layer. In some embodiments, the condensed cyclic compound may be included in the emission layer. An organic light-emitting device including a first electrode, a second electrode facing the first electrode, and an organic layer that is disposed between the first electrode and the second electrode and includes an emission layer, wherein the organic layer includes the condensed cyclic compound represented by Formula 1, may be provided.
As used herein, the expression the “(organic layer) includes at least one condensed-cyclic compound” may be construed as meaning the “(organic layer) may include one condensed-cyclic compound represented by Formula 1 or two different condensed-cyclic compounds represented by Formula 1”.
For example, the organic layer may include only Compound 1 as the condensed-cyclic compound. In this regard, Compound 1 may be included in an emission layer of an organic light-emitting device. In another embodiment, the organic layer may include Compound 1 and Compound 2 as the condensed cyclic compound. In this regard, Compound 1 and Compound 2 may be included in the same layer (for example, Compound 1 and Compound 2 may both be included in an emission layer) or in different layers (for example, Compound 1 may be included in a hole transport layer and Compound 2 may be included in an emission layer).
The organic layer may include i) a hole-transport region that is disposed between the first electrode (an anode) and the emission layer and includes at least one selected from a hole injection layer, a hole transport layer, a buffer layer, and an electron blocking layer; and ii) an electron transport region that is disposed between the emission layer and the second electrode (a cathode) and includes at least one selected from a hole blocking layer, an electron transport layer, and an electron injection layer. At least one of the hole transport region and the emission layer may include the condensed cyclic compound represented by Formula 1. For example, the hole transport region may include the hole transport layer, and the hole transport layer may include the condensed cyclic compound represented by Formula 1.
As used herein, the term the “organic layer” refers to a single layer and/or a plurality of layers disposed between the first electrode and the second electrode in an organic light-emitting device. The “organic layer” may include other materials in addition to an organic material.
Hereinafter, a structure of the organic light-emitting device 10 and a method of manufacturing the organic light-emitting device 10 will be described with reference to
A substrate may be additionally disposed under the first electrode 110 or on the second electrode 190. The substrate may be made of a material having excellent mechanical strength, thermal stability, transparency, surface smoothness, ease of handling, and waterproofness. For example, the substrate may be a glass substrate or a transparent plastic substrate.
For example, the first electrode 110 may be formed by depositing or sputtering a first electrode material on the substrate. When the first electrode 110 is an anode, the first electrode material may be selected from materials with a high work function to facilitate hole injection. The first electrode 110 may be a reflective electrode, a semi-transmissive electrode, or a transmissive electrode. The first electrode material may be an indium tin oxide (ITO), an indium zinc oxide (IZO), a tin oxide (SnO2), or a zinc oxide (ZnO) which may give transparency and conductivity to the first electrode. 110. In some embodiments, in order to form the first electrode 110 that is a semi-transmissive electrode or a transmissive electrode, the first electrode material may be at least one selected from magnesium (Mg), aluminum (Al), aluminum-lithium (Al−Li), calcium (Ca), magnesium-indium (Mg—In), and magnesium-silver (Mg—Ag).
The first electrode 110 may have a single-layer structure or a multi-layer structure including two or more layers. For example, the first electrode 110 may have a triple-layer structure of ITO/Ag/ITO.
The organic layer 150 may be disposed on the first electrode 110. The organic layer 150 may include an emission layer.
The organic layer 150 may further include a hole transport region that is disposed between the first electrode 110 and the emission layer and an electron transport region that is disposed between the emission layer and the second electrode 190.
The hole transport region may include at least one of a hole injection layer (HIL), a hole transport layer (HTL), a buffer layer, and an electron blocking layer (EBL), and the electron transport region may include at least one of a hole blocking layer (HBL), an electron transport layer (ETL), and an electron injection layer (EIL).
The hole transport region may have a single-layered structure formed of a single material, a single-layered structure formed of a plurality of different materials, or a multi-layered structure having a plurality of layers formed of a plurality of different materials.
For example, the hole transport region may have a single-layered structure formed of a plurality of different materials, or a structure of hole injection layer/hole transport layer, a structure of hole injection layer/hole transport layer/buffer layer, a structure of hole injection layer/buffer layer, a structure of hole transport layer/buffer layer, or a structure of hole injection layer/hole transport layer/electron blocking layer, wherein layers of each structure are sequentially stacked from the emission layer in the stated order.
When the hole transport region includes a hole injection layer, the hole injection layer may be formed on the first electrode 110 by a suitable method, such as vacuum deposition, spin coating, casting, a Langmuir-Blodgett (LB) method, inkjet printing, laser printing, or laser-induced thermal imaging (LITI).
When a hole injection layer is formed by vacuum deposition, for example, the vacuum deposition may be performed at a deposition temperature in a range of about 100° C. to about 500° C., at a vacuum degree in a range of about 10−8 torr to about 10−3 torr, and at a deposition rate in a range of about 0.01 Å/sec to about 100 Å/sec, by taking into account a compound for forming a hole injection layer and a structure of a desired hole injection layer.
When a hole injection layer is formed by spin coating, the spin coating may be performed at a coating rate in a range of about 2,000 rpm to about 5,000 rpm and at a temperature in a range of about 80° C. to about 200° C., by taking into account a compound for forming a hole injection layer and a structure of a desired hole injection layer.
When the hole transport region includes a hole transport layer, the hole transport layer may be formed on the first electrode 110 or the hole injection layer by a suitable method, such as vacuum deposition, spin coating, casting, an LB method, inkjet printing, laser printing, or LITI. When the hole transport layer is formed by vacuum deposition or spin coating, the deposition conditions or the coating conditions may be inferred based on the conditions for forming the hole injection layer.
The hole transport region may include, for example, at least one of m-MTDATA, TDATA, 2-TNATA, NPB, β-NPB, TPD, Spiro-TPD, Spiro-NPB, α-NPB, TAPC, HMTPD, 4,4′,4″-tris(N-carbazolyl)triphenylamine (TCTA), polyaniline/dodecyl benzenesulfonic acid (Pani/DBSA), poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) (PEDOT/PSS), polyaniline/camphor sulfonicacid (Pani/CSA), (polyaniline)/poly(4-styrenesulfonate) (PANI/PSS), a compound represented by Formula 201, or a compound represented by Formula 202:
In Formulae 201 and 202,
L201 to L205 may have the same definition as L1 in Formula 2;
xa1 to xa4 may be each independently selected from 0, 1, 2, and 3;
xa5 may be selected from 1, 2, 3, 4, and 5;
R201 to R204 may be each independently selected from a substituted or unsubstituted C3-C10 cycloalkyl group, a substituted or unsubstituted C1-C10 heterocycloalkyl group, a substituted or unsubstituted C3-C10 cycloalkenyl group, a substituted or unsubstituted C1-C10 heterocycloalkenyl group, a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C6-C60 aryloxy group, a substituted or unsubstituted C6-C60 arylthio group, a substituted or unsubstituted C1-C60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group.
For example, in Formulae 201 and 202,
L201 to L205 may be each independently selected from:
a phenylene group, a naphthylene group, a fluorenylene group, a spiro-fluorenylene group, a benzofluorene group, a dibenzofluorene group, a phenanthrenylene group, an anthracenylene group, a pyrenylene group, a chrysenylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, a quinolinylene group, an isoquinolinylene group, a quinoxalinylene group, a quinazolinylene group, a carbazolylene group, and a triazinylene group; and
a phenylene group, a naphthylene group, a fluorenylene group, a spiro-fluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenanthrenylene group, an anthracenylene group, a pyrenylene group, a chrysenylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, a quinolinylene group, an isoquinolinylene group, a quinoxalinylene group, a quinazolinylene group, a carbazolylene group, and a triazinylene group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group;
xa1 to xa4 are each independently 0, 1, or 2;
xa5 is 1, 2, or 3;
R201 to R204 may be each independently selected from:
a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; and
a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a naphthyl group, an azulenyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group.
The compound represented by Formula 201 may be represented by Formula 201 A:
For example, the compound represented by Formula 201 may be represented by Formula 201A-1:
The compound represented by Formula 202 may be represented by Formula 202A:
In Formula 201A, 201A-1, and 202A, L201 to L203, xa1 to xa3, xa5, and R202 to R204 is the same as defined with respect to Formulae 201 and 202. R211 may have the same definition as R203 in Formulae 201 and 202. R213 to R216 may be each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof: a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group
The compound represented by Formula 201 and the compound represented by Formula 202 may include Compounds HT1 to HT20:
A thickness of the hole transport region may be in a range of about 100 Å to about 10,000 Å, or, for example, about 100 Å to about 1,000 Å. When the hole transport region includes both a hole injection layer and a hole transport layer, a thickness of the hole injection layer may be in a range of about 100 Å to about 10,000 Å, or, for example, about 100 Å to about 1,000 Å, and a thickness of the hole transport layer may be in a range of about 50 Å to about 2,000 Å, or, for example, about 100 Å to about 1,500 Å. When thicknesses of the hole transport region, the hole injection layer, and the hole transport layer are within these ranges, hole transporting properties of the hole transport region may be satisfactory without a substantial increase in driving voltage.
The hole transport region may further include a charge-generating material to improve conductive properties in addition to the materials stated above. The charge-generating material may be homogeneously or non-homogeneously dispersed throughout the hole transport region.
The charge-generating material may be, for example, a p-dopant. The p-dopant may be, for example, a quinone derivative, a metal oxide, or a cyano group-containing compound. For example, the p-dopant may be a quinone derivative, such as tetracyanoquinonedimethane (TCNQ) or 2,3,5,6-tetrafluoro-tetracyano-1,4-benzoquinonedimethane (F4-TCNQ); a metal oxide, such as a tungsten oxide or a molybdenum oxide, and Compound HT-D1:
The hole transport region may further include at least one selected from a buffer layer and an electron blocking layer in addition to the hole injection layer and the hole transport layer. The buffer layer may compensate for an optical resonance distance according to a wavelength of light emitted from the emission layer. Accordingly, the light-emission efficiency of the organic light-emitting device including the buffer layer may improve. A material in the buffer layer may be a material that is also included in the hole transport region. The electron blocking layer may prevent injection of electrons from the electron transport region.
An emission layer may be formed on the first electrode 110 or the hole transport region by using a suitable method, such as vacuum deposition, spin coating, casting, an LB method, inkjet printing, laser printing, or LITI. When the emission layer is formed by vacuum deposition or spin coating, deposition and coating conditions for forming the emission layer may be determined by referring to the deposition and coating conditions for forming the hole injection layer.
When the organic light-emitting device 10 is a full-color organic light-emitting device, the emission layer may be patterned into sub-pixels including a red emission layer, a green emission layer, or a blue emission layer. In some implementations, the emission layer may have a stacked structure of a red emission layer, a green emission layer, and a blue emission layer, or may include a red-light emission material, a green-light emission material, and a blue-light emission material that are mixed with each other in a single layer, to emit white light.
The emission layer may include the condensed cyclic compound represented by Formula 1.
The emission layer may include a host and a dopant. The host may include the condensed cyclic compound represented by Formula 1.
The host may include at least one of TPBi, TBADN, ADN (also, referred to as “DNA”), CBP, CDBP, and TCP:
In some embodiments, the host may include a compound represented by Formula 301:
Ar301-[(L301)xb1-R301]xb2 <Formula 301>
In Formula 301,
Ar301 may be selected from:
a naphthalene, a heptalene, a fluorene, a spiro-fluorene, a benzofluorene, a dibenzofluorene, a phenalene, a phenanthrene, an anthracene, a fluoranthene, a triphenylene, a pyrene, a chrysene, naphthacene, a picene, a perylene, a pentaphene, and an indenoanthracene; and
a naphthalene, a heptalene, a fluorene, a spiro-fluorene, a benzofluorene, a dibenzofluorene, a phenalene, a phenanthrene, an anthracene, a fluoranthene, a triphenylene, a pyrene, a chrysene, naphthacene, a picene, a perylene, a pentaphene, and an indenoanthracene, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, C1-C60 alkyl group, C2-C60 alkenyl group, C2-C60 alkynyl group, C1-C60 alkoxy group, C3-C10 cycloalkyl group, C1-C10 heterocycloalkyl group, C3-C10 cycloalkenyl group, C1-C10 heterocycloalkenyl group, C6-C60 aryl group, C6-C60 aryloxy group, C6-C60 arylthio group, C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group and —Si(Q301)(Q302)(Q303) (where, Q301 to Q303 are each independently selected from a hydrogen, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C6-C60 aryl group, and a C1-C60 heteroaryl group);
L301 may have the same definition as L1;
R301 may be selected from:
a C1-C20 alkyl group and a C1-C20 alkoxy group;
a C1-C20 alkyl group and a C1-C20 alkoxy group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group;
a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazole group, and a triazinyl group; and
a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazole group, and a triazinyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group:
xb1 may be selected from 0, 1, 2, and 3; and
xb2 may be selected from 1, 2, 3, and 4.
For example, in Formula 301,
L301 may be selected from:
a phenylene group, a naphthylene group, a fluorenylene group, a spiro-fluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenanthrenylene group, an anthracenylene group, a pyrenylene group, and a chrysenylene group; and
a phenylene group, a naphthylene group, a fluorenylene group, a spiro-fluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenanthrenylene group, an anthracenylene group, a pyrenylene group, and a chrysenylene group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, and a chrysenyl group; and
R301 may be selected from:
a C1-C20 alkyl group and a C1-C20 alkoxy group:
a C1-C20 alkyl group and a C1-C20 alkoxy group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, and a chrysenyl group;
a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, and a chrysenyl group; and
a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, and a chrysenyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, and a chrysenyl group.
For example, the host may include a compound represented by Formula 301A:
In Formula 301A, description of the substituents may be understood by referring to the descriptions provided herein.
The compound represented by Formula 301 may include at least one of Compounds H1 to H42:
In some embodiments, the host may include at least one of Compounds H43 to H49:
The dopant may include at least one selected from a fluorescent dopant and a phosphorescent dopant. When the dopant includes a fluorescent dopant, the fluorescent dopant may include the condensed cyclic compound represented by Formula 1.
The fluorescent dopant may include at least one selected from DPAVBi, BDAVBi, TBPe, DCM, DCJTB, Coumarin 6, and C545T in addition to the condensed cyclic compound represented by Formula 1:
An amount of the dopant in the emission layer may be typically in a range of about 0.01 to about 15 parts by weight based on 100 parts by weight of the host.
A thickness of the emission layer may be in a range of about 100 Å to about 1,000 Å, or, for example, about 200 Å to about 600 Å. When a thickness of the emission layer is within this range, light-emission characteristics of the emission layer may be excellent without a substantial increase in driving voltage.
An electron transport region may be disposed on the emission layer.
The electron transport region may include at least one selected from a hole blocking layer, an electron transport layer (ETL), and an electron injection layer.
For example, the electron transport region may have a structure of electron transport layer/electron injection layer or a structure of hole blocking layer/electron transport layer/electron injection layer, wherein layers of each structure are sequentially stacked from the emission layer in the stated order.
In some embodiments, the organic layer 150 of the organic light-emitting device 10 may include an electron transport region disposed between the emission layer and the second electrode 190.
When the electron transport region includes a hole blocking layer, the hole blocking layer may be formed on the emission layer by a suitable method, such as vacuum deposition, spin coating, casting, an LB method, inkjet printing, laser printing, or LITI. When the hole blocking layer is formed by vacuum deposition or spin coating, deposition and coating conditions for forming the hole blocking layer may be determined by referring to the deposition and coating conditions for forming the hole injection layer.
The hole blocking layer may include, for example, at least one selected from BCP and Bphen.
A thickness of the hole blocking layer may be in a range of about 20 Å to about 1,000 Å, or, for example, about 30 Å to about 300 Å. When a thickness of the hole blocking layer is within this range, hole blocking characteristics of the hole blocking layer may be excellent without a substantial increase in driving voltage.
The electron transport region may include an electron transport layer. The electron transport layer may be formed on the emission layer or the hole blocking layer by a suitable method, such as vacuum deposition, spin coating, casting, an LB method, inkjet printing, laser printing, or LITI. When an electron transport layer is formed by vacuum deposition or spin coating, vacuum deposition and coating conditions for forming the electron transport layer may be determined by referring to the vacuum deposition and coating conditions for forming the hole injection layer.
In some embodiments, the electron transport layer may include at least one compound selected from a compound represented by Formula 601 and a compound represented by Formula 602:
Ar601-[(L601)xe1-E601]xe2 <Formula 601>
In Formula 601,
Ar601 may be selected from:
a naphthalene, a heptalene, a fluorene, a spiro-fluorene, a benzofluorene, a dibenzofluorene, a phenalene, a phenanthrene, an anthracene, a fluoranthene, a triphenylene, a pyrene, a chrysene, a naphthacene, a picene, a perylene, a pentaphene, and an indenoanthracene; and
a naphthalene, a heptalene, a fluorene, a spiro-fluorene, a benzofluorene, a dibenzofluorene, a phenalene, a phenanthrene, an anthracene, a fluoranthene, a triphenylene, a pyrene, a chrysene, a naphthacene, a picene, a perylene, a pentaphene, and an indenoanthracene, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, and —Si(Q301)(Q302)(Q303) (where, Q301 to Q303 are each independently selected from a hydrogen, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C6-C60 aryl group, and a C1-C60 heteroaryl group);
L601 may have the same definition as L201;
E601 may be selected from:
a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group; and
a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group, each substituted with at least one selected from a deuterium. —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridinyl group, and an imidazopyrimidinyl group:
xe1 may be selected from 0, 1, 2, and 3; and
xe2 may be selected from 1, 2, 3, and 4.
In Formula 602,
X611 may be N or C-(L611)xe611-R611, X612 may be N or C-(L612)xe612-R612, X613 may be N or C-(L613)xe613-R613, and at least one selected from X611 to X613 may be N;
L611 to L616 may each have the same definition as L201;
R611 to R616 may be each independently selected from:
a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; and
a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group, each substituted with a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a naphthyl group, an azulenyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; and
xe611 to xe616 may be each independently selected from 0, 1, 2, and 3.
The compound represented by Formula 601 and the compound represented by Formula 602 may be each independently selected from Compounds ET1 to ET15:
In some embodiments, the electron transport layer may include at least one of BCP, Bphen, Alq3, Balq, TAZ, and NTAZ:
A thickness of the electron transport layer may be in a range of about 100 Å to about 1,000 Å, or, for example, about 150 Å to about 500 Å. When a thickness of the electron transport layer is within this range, the hole transport characteristics of the electron transport layer may be excellent without a substantial increase in driving voltage.
Also, the electron transport layer may further include a metal-containing material in addition to the materials described above.
The metal-containing material may include a Li complex. The Li complex may include, for example, Compound ET-D1 (lithium quinolate, LiQ) or ET-D2.
The electron transport region may include an electron injection layer that facilitates electron injection from the second electrode 190.
The electron injection layer may be formed on the electron transport layer by a suitable method, such as vacuum deposition, spin coating, casting, an LB method, inkjet printing, laser printing, or LITI. When an electron injection layer is formed by vacuum deposition or spin coating, vacuum deposition and coating conditions for the electron injection layer may be determined by referring to the vacuum deposition and coating conditions for the hole injection layer.
The electron injection layer may include at least one selected from LiF, NaCl, CsF, Li2O, BaO, and LiQ.
A thickness of the electron injection layer may be in a range of about 1 Å to about 100 Å, or, for example, about 3 Å to about 90 Å. When the thickness of the electron injection layer is within this range, the electron injection characteristics of the electron injection layer may be satisfactory without a substantial increase in driving voltage.
The second electrode 190 may be disposed on the organic layer 150. The second electrode 190 may be a cathode that is an electron injection electrode. A second electrode material for forming the second electrode 190 may be a material having a low work function such a metal, an alloy, an electrically conductive compound, or a mixture thereof. Examples of the second electrode material may include lithium (Li), magnesium (Mg), aluminum (Al), aluminum-lithium (Al−Li), calcium (Ca), magnesium-indium (Mg—In), and magnesium-silver (Mg—Ag). In some embodiments, the second electrode material may be ITO or IZO. The second electrode 190 may be a reflective electrode or a transmissive electrode.
Hereinbefore, the organic light-emitting device 10 has been described with reference to
The term “C1-C60 alkyl group” used herein refers to a linear or branched aliphatic monovalent hydrocarbon group having 1 to 60 carbon atoms. Examples of the C1-C60 alkyl group may include a methyl group, an ethyl group, a propyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a pentyl group, an iso-amyl group, and a hexyl group. The term “C1-C60 alkylene group” used herein refers to a divalent group having a same structure as a C1-C6 alkyl group.
The term “C1-C60 alkoxy group” used herein refers to a monovalent group represented by —OA101 (where, A101 is the C1-C60 alkyl group). Examples of the C1-C60 alkoxy group may include a methoxy group, an ethoxy group, and an isopropyloxy group.
The term “C2-C60 alkenyl group” used herein refers to a hydrocarbon group including at least one carbon double bond in the middle or at a terminal of the C2-C60 alkyl group. Examples of the C2-C60 alkenyl group may include an ethenyl group, a prophenyl group, and a butenyl group. The term “C2-C60 alkenylene group” used herein refers to a divalent group having a same structure as a C2-C60 alkenyl group.
The term “C2-C60 alkynyl group” used herein refers to a hydrocarbon group including at least one carbon triple bond in the middle or at a terminal of the C2-C60 alkyl group. Examples of the C2-C60 alkynyl group may include an ethynyl group and a propynyl group. The term “C2-C60 alkynylene group” used herein refers to a divalent group having a same structure as a C2-C60 alkynyl group.
The term “C3-C10 cycloalkyl group” used herein refers to a monovalent monocyclic saturated hydrocarbon group including 3 to 10 carbon atoms. Examples of the C3-C10 cycloalkyl group may include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, and a cycloheptyl group. The term “C3-C10 cycloalkylene group” used herein refers to a divalent group having a same structure as a C3-C10 cycloalkyl group.
The term “C1-C10 heterocycloalkyl group” used herein refers to a monovalent monocyclic group including at least one heteroatom selected from N, O, Si, P, and S as a ring-forming atom and 1 to 10 carbon atoms. Examples of the C1-C10 heterocycloalkyl group may include a tetrahydrofuranyl group and a tetrahydrothiophenyl group. The term “C1-C10 heterocycloalkylene group” used herein refers to a divalent group having a same structure as a C1-C10 heterocycloalkyl group.
The term “C3-C10 cycloalkenyl group” used herein refers to a monovalent monocyclic group including 3 to 10 carbon atoms and at least one double bond in the ring of the C3-C10 cycloalkenyl group, and does not have aromacity. Examples of the C3-C10 cycloalkenyl group may include a cyclopentenyl group, a cyclohexenyl group, and a cycloheptenyl group. The term “C3-C10 cycloalkenylene group” used herein refers to a divalent group having a structure as a C3-C10 cycloalkenyl group.
The term “C1-C10 heterocycloalkenyl group” used herein refers to a monovalent monocyclic group including at least one heteroatom selected from N, O, Si, P, and S as a ring-forming atom, 1 to 10 carbon atoms, and at least one double bond in its ring. Examples of the C1-C10 heterocycloalkenyl group may include a 2,3-hydrofuranyl group and a 2,3-hydrothiophenyl group. The term “C1-C10 heterocycloalkenylene group” used herein refers to a divalent group having a same structure as a C1-C10 heterocycloalkenyl group.
The term “C6-C60 aryl group” used herein refers to a monovalent group including a carbocyclic aromatic system having 6 to 60 carbon atoms, and a C6-C60 arylene group used herein refers to a divalent group including a carbocyclic aromatic system having 6 to 60 carbon atoms. Examples of the C6-C60 aryl group may include a phenyl group, a naphthyl group, an anthracenyl group, a phenanthrenyl group, a pyrenyl group, and a chrysenyl group. When the C6-C60 aryl group and the C6-C60 arylene group each include two or more rings, the rings may be fused to each other.
The term “C1-C60 heteroaryl group” used herein refers to a monovalent group having a carbocyclic aromatic system including at least one heteroatom selected from N, O, P, and S as a ring-forming atom and 1 to 60 carbon atoms. The term “C1-C60 heteroarylene group” used herein refers to a divalent group having a carbocyclic aromatic system including at least one heteroatom selected from N, O, Si, P, and S as a ring-forming atom and 1 to 60 carbon atoms. Examples of the C1-C60 heteroaryl group may include a pyridinyl group, a pyrimidinyl group, a pyrazinyl group, a pyridazinyl group, a triazinyl group, a quinolinyl group, and an isoquinolinyl group. When the C1-C60 heteroaryl group or the C1-C60 heteroarylene group includes two or more rings, the rings may be fused to each other.
The term “C6-C60 aryloxy group” used herein denotes —OA102 (where, A102 is the C6-C60 aryl group), and the term “C6-C60 arylthio group” used herein denotes —SA103 (where, A103 is the C6-C60 aryl group).
The term “monovalent non-aromatic condensed polycyclic group” used herein refers to a monovalent group (for example, having 8 to 60 carbon atoms) that has two or more rings condensed to each other, only carbon atoms as a ring forming atom, and non-aromacity in the entire molecular structure. Examples of the monovalent non-aromatic condensed polycyclic group may include a fluorenyl group. A divalent non-aromatic condensed polycyclic group used herein refers to a divalent group having the same structure as the monovalent non-aromatic condensed polycyclic group.
The term “monovalent non-aromatic condensed heteropolycyclic group” used herein refers to a monovalent group (for example, having 1 to 60 carbon atoms) that has two or more rings condensed to each other, has a heteroatom selected from N, O, Si, P, and S, other than carbon atoms, as a ring forming atom, and has non-aromacity in the entire molecular structure. An example of the monovalent non-aromatic condensed heteropolycyclic group may include a carbazolyl group. The term “divalent non-aromatic condensed hetero-polycyclic group” used herein refers to a divalent group having a same structure as a monovalent non-aromatic condensed hetero-polycyclic group.
As used herein, the at least one substituent of the substituted C3-C10 cycloalkylene group, substituted C1-C10 heterocycloalkylene group, substituted C3-C10 cycloalkenylene group, substituted C1-C10 heterocycloalkenylene group, substituted C6-C60 arylene group, substituted C1-C60 heteroarylene group, substituted divalent non-aromatic condensed polycyclic group, substituted divalent non-aromatic condensed heteropolycyclic group, substituted C1-C60 alkyl group, substituted C2-C60 alkenyl group, substituted C2-C60 alkynyl group, substituted C1-C60 alkoxy group, substituted C3-C10 cycloalkyl group, substituted C1-C10 heterocycloalkyl group, substituted C3-C10 cycloalkenyl group, substituted C1-C10 heterocycloalkenyl group, substituted C6-C60 aryl group, substituted C6-C60 aryloxy group, substituted C6-C60 arylthio group, substituted C1-C60 heteroaryl group, substituted monovalent non-aromatic condensed polycyclic group, and substituted monovalent non-aromatic condensed heteropolycyclic group is selected from:
a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, and a C1-C60 alkoxy group;
a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, and a C1-C60 alkoxy group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, and —Si(Q11)(Q12)(Q13);
a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group;
a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, and —Si(Q21)(Q22)(Q23); and
—Si(Q31)(Q32)(Q33),
wherein Q11 to Q13, Q21 to Q23, and Q31 to Q33 may be each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group.
As used herein, the expression “Ph” denotes a phenyl group, the expression “Me” denotes a methyl group, the expression “Et” denotes an ethyl group, and the expression “ter-Bu” or “But” denotes a tert-butyl group.
The following Examples and Comparative Examples are provided in order to highlight characteristics of one or more embodiments, but it will be understood that the Examples and Comparative Examples are not to be construed as limiting the scope of the embodiments, nor are the Comparative Examples to be construed as being outside the scope of the embodiments. Further, it will be understood that the embodiments are not limited to the particular details described in the Examples and Comparative Examples. The wording “B was used instead of A” used in describing Synthesis Examples denotes that a molar equivalent of A was identical to a molar equivalent of B.
8.9 g (50 mmol) of N-bromosuccinimide was added to a solution prepared by dissolving 12.6 g (50 mmol) of benzo[e]pyrene in 800 ml of CH2Cl2, and the mixture was stirred at room temperature for 12 hours. Then, an organic layer was extracted therefrom three times by using 150 ml of water and 300 ml of methylene chloride. The organic layer was dried using magnesium sulfate, and a solvent was removed therefrom by evaporation. The residue was recrystallized using methanol, and thus, 13.7 g (yield: 83%) of Intermediate A-1 was obtained. The compound thus obtained was confirmed by using LC-MS. C20H11Br: M+331.16
1.32 g (4 mmol) of Intermediate A-1 was stirred in 100 ml of THF at −78° C. for 30 minutes in an N2 atmosphere, and then, 2 ml of 2.5 M n-BuLi was slowly added thereto by using a dropping funnel, and the mixture was additionally stirred for 30 minutes. Then, 830 mg (4.5 mmol) of fluorodiphenylborane was added thereto. After 3 hours of additional stirring the mixture at room temperature, an organic layer was extracted three times by using water and diethyl ether. The organic layer thus obtained was dried using magnesium sulfate, a solvent was removed therefrom by evaporation, and then, the residue was separated and purified through silica gel chromatography to obtain 1.22 g (2.94 mmol, yield: 73.5%) of Intermediate A-2. The compound thus obtained was confirmed by using LC-MS. C32H21B: M+416.38
Intermediate A-3 (yield: 76%) was obtained in the same manner as in the synthesis of Intermediate A-1, except that Intermediate A-2 was used instead of benzo[e]pyrene. The compound thus obtained was confirmed by using LC-MS. C32H20BBr: M+495.31
1.1 g (2.2 mmol) of Intermediate A-3 was dissolved in 50 ml of toluene with 423 mg (2.5 mmol) of diphenyl amine, 200 mg (0.22 mmol) of Pd2(dba)3, 634 mg (6.6 mmol) of NaOtBu, and 45 mg (0.22 mmol) of P(tBu)3 in an N2 atmosphere, and stirred at 80° C. for 2 hours. Then, an organic layer was extracted therefrom three times by using water and diethyl ether. The organic layer thus obtained was dried using magnesium sulfate, and a solvent was removed therefrom by evaporation. The residue was separated and purified through silica gel chromatography to obtain 1.22 g (1.78 mmol, yield: 80.9%) of Compound 1. The compound thus obtained was confirmed by using 1H-NMR and LC-MS.
1.34 g (1.91 mmol) of Compound 6 was obtained in the same manner as in the synthesis of Compound 1, except that 9,9-dimethyl-N-phenyl-9H-fluoren-2-amine was used instead of diphenyl amine. The compound thus obtained was confirmed by using 1H-NMR and LC-MS.
2.4 g (15 mmol) of bromine was added to a solution prepared by completely dissolving 7.57 g (30 mmol) of benzo[e]pyrene in 500 ml of CH2Cl2, and the mixture was stirred at 0° C. for 2 hours. Then, an organic layer was extracted therefrom three times by using 100 ml of water and 200 ml of methylene chloride. The organic layer thus obtained was dried using magnesium sulfate, and a solvent was removed therefrom by evaporation. The residue was recrystallized using methanol to obtain 8.5 g (20.7 mmol, yield: 69%) of Intermediate B-1. The compound thus obtained was confirmed by using LC-MS. C20H10Br2: M+410.04
8.5 g (20.7 mmol) of Intermediate B-1 was dissolved in 500 ml of THF and stirred at −78° C. for 30 minutes in an N2 atmosphere, and then, 48 ml of 2.5 M n-BuLi was slowly added thereto by using a dropping funnel and the mixture was additionally stirred for 30 minutes. Then, 17.0 g (120 mmol) of diiodo methane was added thereto. After 3 hours of additional stirring the mixture at room temperature, an organic layer was extracted three times by using water and diethyl ether. The organic layer thus obtained was dried using magnesium sulfate, a solvent was removed therefrom by evaporation, and then, the residue was separated and purified through silica gel chromatography to obtain 3.45 g (12.3 mmol, yield: 59.3%) of Intermediate B-2. The compound thus obtained was confirmed by using LC-MS. C22H16: M+280.37
1.01 g (1.17 mmol) of Compound 12 was obtained in the same manner as in the synthesis of Compound 1, except that Intermediate B-2 was used instead of benzo[e]pyrene, fluorodimesitylborane was used instead of fluorodiphenylborane, and N-([1,1′-biphenyl]-2-yl)dibenzo[b,d]furan-4-amine was used instead of diphenyl amine. The compound thus obtained was confirmed by using 1H-NMR and LC-MS.
1.04 g (1.38 mmol) of Compound 16 was obtained in the same manner as in the synthesis of Compound 1, except that 5′-fluoro-N-phenyl-[1,1′: 3′,1″-terphenyl]-4′-amine was used instead of diphenyl amine. The compound thus obtained was confirmed by using 1H-NMR and LC-MS.
1.48 g (1.61 mmol) of Compound 23 was obtained in the same manner as in the synthesis of Compound 1, except that [1,1′-biphenyl]-2-yl(dibenzo[b,d]furan-4-yl)fluoroborane was used instead of fluorodiphenylborane, and N-([1,1′-biphenyl]-2-yl)dibenzo[b,d]furan-4-amine was used instead of diphenyl amine. The compound thus obtained was confirmed by using 1H-NMR and LC-MS.
1.09 g (1.57 mmol) of Compound 27 was obtained in the same manner as in the synthesis of Compound 1, except that fluorobis(phenyl-d5)borane was used instead of fluorodiphenylborane, and N-phenylphenanthren-9-amine was used instead of diphenyl amine. The compound thus obtained was confirmed by using 1H-NMR and LC-MS.
1.09 g (2.4 mmol) of Intermediate C-1 was obtained in the same manner as in the synthesis of Intermediate A-3, except that fluorodimesitylborane was used instead of fluorodiphenylborane. The compound thus obtained was confirmed by using LC-MS. C38H32BBr: M+579.32
1.09 g (2.4 mmol) of Intermediate C-1, 1.11 g (3.0 mmol) of N,N-diphenyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)aniline, 289 mg (0.25 mmol) of Pd(PPh3)4, and 1.04 g (7.5 mmol) of K2CO3 were added to 100 ml of a mixed solvent of THF/H2O (at a volume ratio of 9/1), stirred at 80° C. for 12 hours, and cooled to room temperature. Then, an organic layer was extracted therefrom three times by using 100 ml of water and 100 ml of diethyl ether. The organic layer thus obtained was dried using magnesium sulfate, and a solvent was removed therefrom by evaporation. The residue was separated and purified through silica gel chromatography to obtain 1.23 g (1.65 mmol, yield: 68.8%) of Compound 34. The compound thus obtained was confirmed by using 1H NMR and LC-MS.
1.02 g (1.17 mmol) of Compound 43 was obtained in the same manner as in the synthesis of Compound 12, except that dibenzo[b,d]furan-4-ylfluoro(phenyl)borane was used instead of fluorodimesitylborane. The compound thus obtained was confirmed by using 1H NMR and LC-MS.
The 1H NMR and LC-MS characteristics of compounds 1, 6, 12, 16, 23, 27, 34, and 43 are provided in Table 1, below.
1H NMR (CDCl3, 400 MHz)
An indium tin oxide (ITO) glass substrate (available from Corning) at a thickness of 15 Ω/cm2 (1,200 Å) was cut to a size of 50 mm×50 mm×0.7 mm, sonicated in isopropyl alcohol and pure water for 5 minutes each, and then cleaned with UV and ozone for 30 minutes. The ITO glass substrate was then mounted on a vacuum depositor.
2-TNATA was deposited on the ITO glass substrate (an anode) to form a hole injection layer having a thickness of 600 Å, 4,4′-bis[N-(1-naphthyl)-N-phenylamino]biphenyl (NPB) was deposited on the hole injection layer to form a hole transport layer having a thickness of 300 Å, and thus, a hole transport region was formed.
9,10-di-naphthalene-2-yl-anthracene (DNA) as a host and Compound 1, as a dopant, were codeposited on the hole transport region at a weight ratio of 98:2 to form an emission layer having at thickness of 300 Å.
Alq3 was vacuum-deposited on the emission layer to form an electron transport layer having a thickness of 300 Å, LiF was deposited on the electron transport layer to form an electron injection layer having a thickness of 10 Å, and thus an electron transport region was formed.
Al was deposited on the electron transport region to form a cathode having a thickness of 3,000 Å, thereby completing the manufacture of an organic light-emitting device.
An organic light-emitting device was manufactured in the same manner as in Example 1, except that Compound 6 was used instead of Compound 1 as a dopant in the formation of the emission layer.
An organic light-emitting device was manufactured in the same manner as in Example 1, except that Compound 12 was used instead of Compound 1 as a dopant in the formation of the emission layer.
An organic light-emitting device was manufactured in the same manner as in Example 1, except that Compound 16 was used instead of Compound 1 as a dopant in the formation of the emission layer.
An organic light-emitting device was manufactured in the same manner as in Example 1, except that Compound 23 was used instead of Compound 1 as a dopant in the formation of the emission layer.
An organic light-emitting device was manufactured in the same manner as in Example 1, except that Compound 27 was used instead of Compound 1 as a dopant in the formation of the emission layer.
An organic light-emitting device was manufactured in the same manner as in Example 1, except that Compound 34 was used instead of Compound 1 as a dopant in the formation of the emission layer.
An organic light-emitting device was manufactured in the same manner as in Example 1, except that Compound 43 was used instead of Compound 1 as a dopant in the formation of the emission layer.
An organic light-emitting device was manufactured in the same manner as in Example 1, except that Compound A below was used instead of Compound 1 as a dopant in the formation of the emission layer.
Driving voltages, current densities, luminances, efficiencies, and half-lives of the organic light-emitting devices prepared in Examples 1 to 8 and Comparative Example 1 were evaluated by using a Keithley SMU 236 measurement unit and a PR650 luminance meter. The results are shown in Table 2. The half-life is defined as the time for the luminance of an organic light-emitting device to decline to 50% of its initial luminance.
As shown in Table 2, driving voltages, luminances, efficiencies, and half lives of the organic light-emitting devices prepared in Examples 1 to 8 were excellent, compared to the driving voltages, luminances, efficiencies, and half lives of the organic light-emitting device prepared in Comparative Example 1.
As described above, according to the one or more of the above embodiments, an organic light-emitting device including the condensed cyclic compound may have a low driving voltage, high efficiency, high luminance, and a long lifespan.
Example embodiments have been disclosed herein, and although specific terms are employed, they are used and are to be interpreted in a generic and descriptive sense only and not for purpose of limitation. In some instances, as would be apparent to one of ordinary skill in the art as of the filing of the present application, features, characteristics, and/or elements described in connection with a particular embodiment may be used singly or in combination with features, characteristics, and/or elements described in connection with other embodiments unless otherwise specifically indicated. Accordingly, it will be understood by those of skill in the art that various changes in form and details may be made without departing from the spirit and scope thereof as set forth in the following claims.
Number | Date | Country | Kind |
---|---|---|---|
10-2014-0170824 | Dec 2014 | KR | national |
Number | Name | Date | Kind |
---|---|---|---|
7053255 | Ikeda et al. | May 2006 | B2 |
20030157366 | Matsuura et al. | Aug 2003 | A1 |
20050064233 | Matsuura et al. | Mar 2005 | A1 |
20050156164 | Sotoyama | Jul 2005 | A1 |
20050238910 | Ionkin et al. | Oct 2005 | A1 |
20100277061 | Matsuura et al. | Nov 2010 | A1 |
20110006289 | Mizuki et al. | Jan 2011 | A1 |
20110240976 | Yamada et al. | Oct 2011 | A1 |
20130324771 | Yamada et al. | Dec 2013 | A1 |
Number | Date | Country |
---|---|---|
1142895 | Oct 2001 | EP |
2003-234192 | Aug 2003 | JP |
2007-119454 | May 2007 | JP |
2008-280331 | Nov 2008 | JP |
2011-213649 | Oct 2011 | JP |
2013-253023 | Dec 2013 | JP |
10-2006-0006760 | Jan 2006 | KR |
10-2009-0111355 | Oct 2009 | KR |
10-2010-0097182 | Sep 2010 | KR |
Number | Date | Country | |
---|---|---|---|
20160155951 A1 | Jun 2016 | US |