The present invention relates to an organic compound that is employed as a material for a light efficiency improving layer (capping layer) provided in an organic light emitting device, and an organic light emitting device that employs the same, thus achieving greatly improved luminescent properties such as low-voltage driving of the device and excellent luminous efficiency.
The organic light emitting device may be formed even on a transparent substrate, and may be driven at a low voltage of 10 V or less compared to a plasma display panel or an inorganic electroluminescence (EL) display. In addition, the device consumes relatively little power and has good color representation. The device may display three colors of green, blue, and red, and thus has recently become a subject of intense interest as a next-generation display device.
However, in order for such an organic light emitting device to exhibit the aforementioned characteristics, the materials constituting an organic layer in the device, such as hole injecting materials, hole transport materials, light emitting materials, electron transport materials, and electron injecting materials, are prerequisites for the support by stable and efficient materials. However, the development of a stable and efficient organic layer material for an organic light emitting device has not yet been sufficiently made.
Thus, further improvements in terms of efficiency and life characteristics are required for good stability, high efficiency, long lifetime, and large size of organic light emitting devices. Particularly, there is a strong need to develop materials constituting each organic layer of organic light emitting devices.
In addition, recently, research aimed at improving the characteristics of organic light emitting devices by changes in the performance of each organic layer material, as well as a technique for improving the color purity and enhancing the luminous efficiency by optimizing the optical thickness between an anode and a cathode are considered as one of the crucial factors for improving the device performance. As an example of this method, an increase in light efficiency and excellent color purity are achieved by using a capping layer on an electrode.
Thus, the present invention has been made in an effort to provide a novel organic compound which may be employed in a light efficiency improving layer (capping layer) provided in an organic light emitting device to implement excellent luminescent properties such as low-voltage driving of the device and improved luminous efficiency, and an organic light emitting device including the same.
An aspect of the present invention provides an organic compound represented by Formula I below.
Characteristic structures of Formula I above and specific compounds A and B implemented thereby will be described below.
Another aspect of the present invention provides an organic light emitting device including a first electrode, a second electrode, and one or more organic layers arranged between the first and second electrodes, wherein the organic light emitting device further includes a light efficiency improving layer (capping layer) formed on at least one side opposite to the organic layer among the upper or lower portions of the first electrode and the second electrode, and the light efficiency improving layer includes an organic compound represented by Formula I above.
According to the present invention, an organic compound is employed as a material for a light efficiency improving layer provided in an organic light emitting device to implement low-voltage driving of the organic light emitting device and improved luminescent properties such as excellent luminous efficiency, color purity, etc., and thus can be effectively used in various display devices.
Hereinafter, the present invention will be described in more detail.
The present invention relates to an organic light emitting compound represented by Formula I below, which is employed as a material for a light efficiency improving layer provided in an organic light emitting device to achieve low-voltage driving of the device and luminescent properties such as excellent luminous efficiency, color purity, etc.
In Formula I above,
The compound represented by Formula I according to the present invention is characterized by introducing at least one structure selected from aziridinone, azetidinone, pyrrolidinone, and piperidinone in a benzene ring.
In Structural Formula 1, in each structure, R is each independently selected from hydrogen, deuterium, a cyano group, a halogen group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted halogenated alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted halogenated alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, and a substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms, and in each structure of Structural Formula 1, a plurality of R are the same as or different from each other.
In Structural Formula 2 above,
For specific examples, the substituted aryl group means that a phenyl group, a biphenyl group, a naphthalene group, a fluorenyl group, a pyrenyl group, a phenanthrenyl group, a perylene group, a tetracenyl group, and an anthracenyl group are substituted with other substituents.
In addition, the substituted heteroaryl group means that a pyridyl group, a thiophenyl group, a triazine group, a quinoline group, a phenanthroline group, an imidazole group, a thiazole group, an oxazole group, a carbazole group and a condensate heteroring group thereof, for example, a benzquinoline group, a benzimidazole group, a benzoxazole group, a benzthiazole group, a benzcarbazole group, a dibenzothiophenyl group, and a dibenzofuran group are substituted with other substituents.
In an embodiment of the present invention, examples of the substituents will be described in detail below, but are not limited thereto.
In an embodiment of the present invention, the alkyl groups may be straight or branched. The number of carbon atoms in the alkyl groups is not particularly limited but is preferably from 1 to 20. Specific examples of the alkyl groups include, but are not limited to, methyl, ethyl, propyl, n-propyl, isopropyl, butyl, n-butyl, isobutyl, tert-butyl, sec-butyl, 1-methylbutyl, 1-ethylbutyl, pentyl, n-pentyl, isopentyl, neopentyl, tert-pentyl, hexyl, n-hexyl, 1-methylpentyl, 2-methylpentyl, 4-methyl-2-pentyl, 3,3-dimethylbutyl, 2-ethylbutyl, heptyl, n-heptyl, 1-methylhexyl, cyclopentylmethyl, cyclohexylmethyl, octyl, n-octyl, tert-octyl, 1-methylheptyl, 2-ethylhexyl, 2-propylpentyl, n-nonyl, 2,2-dimethylheptyl, 1-ethylpropyl, 1,1-dimethylpropyl, isohexyl, 2-methylpentyl, 4-methylhexyl, and 5-methylhexyl groups.
In an embodiment of the present invention, the alkoxy groups may be straight or branched. The number of carbon atoms in the alkoxy groups is not particularly limited but is preferably from 1 to 20 as long as steric hindrance is avoided. Specific examples of the alkoxy groups include, but are not limited to, methoxy, ethoxy, n-propoxy, isopropoxy, i-propyloxy, n-butoxy, isobutoxy, tert-butoxy, sec-butoxy, n-pentyloxy, neopentyloxy, isopentyloxy, n-hexyloxy, 3,3-dimethylbutyloxy, 2-ethylbutyloxy, n-octyloxy, n-nonyloxy, n-decyloxy, benzyloxy, and p-methylbenzyloxy groups.
In an embodiment of the present invention, the deuterated alkyl group or alkoxy group and the halogenated alkyl group or alkoxy group mean an alkyl group or alkoxy group in which the above alkyl group or alkoxy group is substituted with deuterium or a halogen group.
In an embodiment of the present invention, the aryl groups may be monocyclic or polycyclic. The number of carbon atoms in the aryl groups is not particularly limited but is preferably from 6 to 30. Examples of the monocyclic aryl groups include phenyl, biphenyl, terphenyl, and stilbene groups but the scope of the present invention is not limited thereto. Examples of the polycyclic aryl groups include naphthyl, anthracenyl, phenanthrenyl, pyrenyl, perylenyl, tetracenyl, chrysenyl, fluorenyl, acenaphathcenyl, triphenylene, and fluoranthrene groups, but the scope of the present invention is not limited thereto.
In addition, in an embodiment of the present invention, the fluorenyl groups refer to structures in which two cyclic organic compounds are linked through one atom, and examples thereof include
In an embodiment of the present invention, the fluorenyl groups include open structures in which one of the two cyclic organic compounds linked through one atom is cleaved, and examples thereof include
In addition, carbon atoms of the ring may be substituted with any one or more heteroatoms selected from among N, S and O, and examples thereof include
and the like.
In an embodiment of the present invention, the heteroaryl groups refer to heterocyclic groups containing heteroatoms selected from O, N, and S. The number of carbon atoms is not particularly limited, but preferably from 2 to 30. In an embodiment of the present invention, specific examples thereof include, but are not limited to, thiophene, furan, pyrrole, imidazole, thiazole, oxazole, oxadiazole, triazole, pyridyl, bipyridyl, pyrimidyl, triazine, triazole, acridyl, pyridazine, pyrazinyl, quinolinyl, quinazoline, quinoxalinyl, phthalazinyl, pyridopyrimidinyl, pyridopyrazinyl, pyrazinopyrazinyl, isoquinoline, indole, carbazole, benzoxazole, benzimidazole, benzothiazole, benzocarbazole, benzothiophene, dibenzothiophene, benzofuranyl, dibenzofuranyl, phenanthroline, thiazolyl, isoxazolyl, oxadiazolyl, thiadiazolyl, benzothiazolyl, phenothiazinyl, phenoxazine, and phenothiazine groups.
In an embodiment of the present invention, the amine group may be —NH2, an alkylamine group, an arylamine group, heteroaryl amino group, an arylheteroarylamine group, etc., the aryl (heteroaryl)amine group means an amine substituted with an aryl group and/or heteroaryl group, and the alkylamine group means an amine substituted with an alkyl group. Examples of the aryl (heteroaryl)amine group include a substituted or unsubstituted mono aryl (heteroaryl)amine group, a substituted or unsubstituted diaryl (heteroaryl)amine group, or a substituted or unsubstituted triaryl (heteroaryl)amine group, wherein the aryl group and the heteroaryl group in the aryl (heteroaryl)amine group are the same as the definition of the aryl group and the heteroaryl group, and the alkyl group in the alkylamine group is also the same as the definition of the alkyl group.
For example, the arylamine group includes a phenylamine group, a naphthylamine group, a biphenylamine group, an anthracenylamine group, a 3-methyl-phenylamine group, a 4-methyl-naphthylamine group, and a 2-methyl-biphenyl amine group, a 9-methyl-anthracenylamine group, a diphenyl amine group, a phenylnaphthylamine group, a ditolylamine group, a phenyltolylamine group, a triphenylamine group, etc., but is not limited thereto.
In an embodiment of the present invention, the silyl group is an unsubstituted silyl group or a silyl group substituted with an alkyl group, an aryl group, and the like, and specific examples of the silyl group may include trimethylsilyl, triethylsilyl, triphenylsilyl, trimethoxysilyl, dimethoxyphenylsilyl, diphenylmethylsilyl, diphenylvinylsilyl, methylcyclobutylsilyl, dimethylfurylsilyl, and the like, but are not limited thereto.
Specific examples of the halogen groups as substituents used in an embodiment of the present invention include fluorine (F), chlorine (CI), and bromine (Br).
In an embodiment of the present invention, a cycloalkyl group refers to a monocyclic, polycyclic and spiro alkyl radical, includes the same, and preferably contains a cyclic carbon atom having 3 to 20 carbon atoms, and includes cyclopropyl, cyclopentyl, cyclohexyl, bicycloheptyl, spirodecyl, spiroundecyl, adamantyl, and the like, and the cycloalkyl group may be arbitrarily substituted.
In an embodiment of the present invention, the heterocycloalkyl group refers to an aromatic or non-aromatic cyclic radical containing one or more heteroatoms, and includes the same, and one or more heteroatoms are selected from among O, S, N, P, B, Si, and Se, preferably O, N or S, and specifically, in the case of including N, the one or more heteroatoms may be aziridine, pyrrolidine, piperidine, azepane, azocane, and the like.
The organic compound according to the present invention represented by Formula I may be used as a material for the light efficiency improving layer (capping layer) provided in the organic light emitting device due to its structural specificity.
Preferred specific examples of the organic compound represented by Formula I according to the present invention include the following compounds but are not limited thereto.
As such, the organic compound according to the present invention can synthesize organic compounds with various properties using moieties with unique properties. As a result, when the organic compound according to the present invention is applied to the light efficiency improving layer provided in the organic light emitting device, it is possible to further improve the luminescent properties such as luminous efficiency, etc. of the device.
In addition, the compound of an embodiment of the present invention may be applied to a device according to a general method for manufacturing an organic light emitting device.
An organic light emitting device according to an embodiment of the present invention may include a first electrode, a second electrode, and an organic layer arranged therebetween. The organic light emitting device may be manufactured using a general device manufacturing method and material, except that the organic compound of an embodiment of the present invention is used to form the organic layer of the device.
The organic layer of the organic light emitting device according to an embodiment of the present invention may have a monolayer structure or a multilayer structure in which two or more organic layers are stacked. For example, the structure of the organic layers may include a hole injecting layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injecting layer, an electron blocking layer, a hole blocking layer, and a light efficiency improving layer (capping layer). The number of the organic layers is not limited and may be increased or decreased.
In addition, the organic electroluminescent device may include a substrate, a first electrode (anode), an organic layer, a second electrode (cathode), and a light efficiency improving layer (capping layer), of which may be formed under the first electrode (bottom emission type) or on the second electrode (top emission type).
When the organic electroluminescent device is of a top emission type, light from the light emitting layer is emitted to the cathode and passes through the light efficiency improving layer (CPL) formed using the compound according to an embodiment of the present invention having a relatively high refractive index. The wavelength of the light is amplified, resulting in an increase in luminous efficiency. When the organic electroluminescent device is of a bottom emission type, the compound according to an embodiment of the present invention is employed in the light efficiency improving layer to improve the luminous efficiency of the organic electroluminescent device based on the same principle.
Preferred structures of the organic layers of the organic light emitting according to an embodiment of the present invention will be explained in more detail in the examples to be described later.
In addition, the organic electroluminescent device of an embodiment of the present invention may be manufactured by depositing a metal, a conductive metal oxide or an alloy thereof on a substrate by a physical vapor deposition (PVD) method such as sputtering or e-beam evaporation to form an anode, forming organic layers including a hole injecting layer, a hole transport layer, a light emitting layer, and an electron transport layer thereon, and depositing a cathode material thereon.
In addition to the above methods, the organic light emitting device may be fabricated by depositing a cathode material, organic layer materials, and an anode material in this order on a substrate. The organic layers may have a multilayer structure including a hole injecting layer, a hole transport layer, a light emitting layer, and an electron transport layer, but is not limited thereto and may have a monolayer structure. In addition, the organic layers may be manufactured in a smaller number of layers by a solvent process using various polymer materials rather than by a deposition process, such as spin coating, dip coating, doctor blading, screen printing, inkjet printing or thermal transfer.
As the anode material, a material having a high work function is generally preferred for easy injection of holes into the organic layers. Specific examples of anode materials suitable for use in an embodiment of the present invention include, but are not limited to: metals such as vanadium, chromium, copper, zinc, and gold and alloys thereof; metal oxides such as zinc oxide, indium oxide, indium thin oxide (ITO), and indium zinc oxide (IZO); combinations of metals and oxides such as ZnO:Al and SnO2:Sb; and conductive polymers such as poly(3-methylthiophene), poly[3,4-(ethylene-1,2-dioxy)thiophene] (PEDT), polypyrrole, and polyaniline.
As the cathode material, a material having a low work function is generally preferred for easy injection of electrons into the organic layers. Specific examples of suitable cathode materials include, but are not limited to: metals such as magnesium, calcium, sodium, potassium, titanium, indium, yttrium, lithium, gadolinium, aluminum, silver, tin, and lead and alloys thereof; and multilayer structure materials such as LiF/Al and LiO2/Al.
The hole injecting material is preferably a material that may receive holes injected from the anode at low voltage. The highest occupied molecular orbital (HOMO) of the hole injecting material is preferably between the work function of the anode material and the HOMO of the adjacent organic layer. Specific examples of hole injecting materials include, but are not limited to, metal porphyrin, oligothiophene, arylamine-based organic materials, hexanitrile hexaazatriphenylene, quinacridone-based organic materials, perylene-based organic materials, anthraquinone, polyaniline, and polythiophene-based conductive polymers.
The hole transport material is a material that may receive holes transported from the anode or the hole injecting layer and may transfer the holes to the light emitting layer. A material with high hole mobility is suitable. Specific examples thereof include arylamine-based organic materials, conductive polymers, and block copolymers consisting of conjugated and non-conjugated segments. The use of the organic compound according to an embodiment of the present invention ensures further improved low-voltage driving characteristics, high luminous efficiency, and life characteristics of the device.
The light emitting material is a material that may receive and recombine holes from the hole transport layer and electrons from the electron transport layer to emit light in the visible ray area. A material with high quantum efficiency for fluorescence and phosphorescence is preferred. Specific examples thereof include, but are not limited to, 8-hydroxyquinoline aluminum complex (Alq3), carbazole-based compounds, dimerized styryl compounds, BAlq, 10-hydroxybenzoquinoline-metal compounds, benzoxazole-based compounds, benzthiazole-based compounds, and benzimidazole-based compounds, poly(p-phenylenevinylene) (PPV)-based polymers, spiro compounds, polyfluorene, and rubrene.
The electron transport material is a material that may receive electrons injected from the cathode and may transfer the electrons to the light emitting layer. A material with high electron mobility is suitable. Specific examples thereof include, but are not limited to, 8-hydroxyquinoline Al complex, Alq3 complexes, organic radical compounds, hydroxyflavone-metal complexes.
The organic light emitting device according to an embodiment of the present invention may be of a top emission, bottom emission or dual emission type according to the materials used.
In addition, the organic compound according to an embodiment of the present invention may perform its function even in organic electronic devices, including organic solar cells, organic photoconductors, and organic transistors, based on a similar principle to that applied to the organic light emitting device.
Hereinafter, the present invention will be explained in more detail with reference to the preferred examples. However, these examples are provided for illustrative purposes and do not serve to limit the scope of the invention. It will be obvious to those skilled in the art that various modifications and changes are possible without departing from the scope and technical spirit of the present invention.
1,3-Dibromo-5-chlorobenzene (10.0 g, 0.037 mol), 2-pyrrolidinone (7.6 g, 0.089 mol), K3PO4 (47.1 g, 0.222 mol), Pd(dba)2 (2.1 g, 0.004 mol), Xant-Phos (15.4 g, 0.027 mol), and dioxane were added and reacted while stirring under reflux for 16 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 8.4 g of Intermediate 4-1 (yield 81.5%).
Intermediate 4-1 (10.0 g, 0.036 mol), 3,5-Di-tert-butylphenylboronic Acid (10.1 g, 0.043 mol), K2CO3 (14.9 g, 0.108 mol), Pd(OAc)2 (2.1 g, 0.002 mol), X-Phos (1.7 g, 0.004 mol), THF 200 mL, and H2O 50 mL were added and reacted while stirring at 90° C. for 6 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 11.2 g of Compound 4 (yield 72.2%).
LC/MS: m/z=432[(M)+]
Intermediate 4-1 (10.0 g, 0.036 mol), 3,5-Bis(trifluoromethyl)phenylboronic acid (11.1 g, 0.043 mol), K2CO3 (14.9 g, 0.108 mol), Pd(OAc)2 (2.1 g, 0.002 mol), X-Phos (1.7 g, 0.004 mol), THF 200 mL, and H2O 50 mL were added and reacted while stirring at 90° C. for 6 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 12.5 g of Compound 7 (yield 75.3%).
LC/MS: m/z=456[(M)+]
Intermediate 4-1 (10.0 g, 0.036 mol), [3,5-Bis[3,5-bis(trifluoromethyl)phenyl]phenyl]boronic acid (23.5 g, 0.043 mol), K2CO3 (14.9 g, 0.108 mol), Pd(OAc)2 (2.1 g, 0.002 mol), X-Phos (1.7 g, 0.004 mol), THF 200 mL, and H2O 50 mL were added and reacted while stirring at 90° C. for 6 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 17.5 g of Compound 12 (yield 65.5%).
LC/MS: m/z=744[(M)+]
Intermediate 4-1 (10.0 g, 0.036 mol), 4-(2-Pyridyl)phenyl boronic acid (8.6 g, 0.043 mol), K2CO3 (14.9 g, 0.108 mol), Pd(OAc)2 (2.1 g, 0.002 mol), X-Phos (1.7 g, 0.004 mol), THF 200 mL, and H2O 50 mL were added and reacted while stirring at 90° C. for 6 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 10.1 g of Compound 22 (yield 70.8%).
LC/MS: m/z=397[(M)+]
1-Bromo-3,5-dichlorobenzene (10.0 g, 0.044 mol), 2-Pyrrolidinone (4.5 g, 0.053 mol), K3PO4 (28.2 g, 0.133 mol), Pd(dba)2 (1.3 g, 0.002 mol), Xant-Phos (4.6 g, 0.008 mol), and dioxane were added and reacted while stirring under reflux for 16 hours. After completion of the reaction, the mixture was extracted, concentrated, and then column and recrystallized to obtain 7.8 g of Intermediate 58-1 (yield 76.6%).
Intermediate 58-1 (10.0 g, 0.044 mol), 3,5-Di-tert-butylphenylboronic Acid (24.4 g, 0.104 mol), K2CO3 (36.0 g, 0.261 mol), Pd(OAc)2 (5.0 g, 0.004 mol), X-Phos (2.1 g, 0.004 mol), THF 200 mL, and H2O 50 mL were added and reacted while stirring at 90° C. for 6 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 15.2 g of Compound 58 (yield 65.0%).
LC/MS: m/z=537[(M)+]
Intermediate 58-1 (10.0 g, 0.044 mol), [3,5-Bis[3,5-bis(trifluoromethyl)phenyl]phenyl]boronic acid (57.0 g, 0.104 mol), K2CO3 (36.0 g, 0.261 mol), Pd(OAc)2 (5.0 g, 0.004 mol), X-Phos (2.1 g, 0.004 mol), THF 200 mL, and H2O 50 mL were added and reacted while stirring at 90° C. for 6 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 31.8 g of Compound 74 (yield 63.0%). LC/MS: m/z=1161[(M)+]
2,5-Dibromopyridine (10.0 g, 0.042 mol), (2-Tert-butylphenyl) boronic acid (9.0 g, 0.051 mol), K2CO3 (17.5 g, 0.127 mol), and Pd(PPh3)4 (1.0 g, 0.0008 mol) were added with toluene 200 mL, ethanol 50 mL, and H2O 50 mL and reacted while stirring at 100° C. for 6 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 7.1 g of Intermediate 84-1 (yield 58.0%).
Intermediate 84-1 (10.0 g, 0.035 mol), Bis(pinacolato)diboron (10.5 g, 0.041 mol), KOAc (10.2 g, 0.103 mol), and Pd(dppf)Cl2 (1.3 g, 0.001 mol) were added with dioxane 200 mL and reacted while stirring at 100° C. for 12 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 7.8 g of Intermediate 84-2 (yield 67.1%).
Intermediate 58-1 (10.0 g, 0.044 mol), Intermediate 84-2 (35.2 g, 0.104 mol), K2CO3 (36.0 g, 0.261 mol), Pd(OAc)2 (5.0 g, 0.004 mol), X-Phos (2.1 g, 0.004 mol), THF 200 mL, and H2O 50 mL were added and reacted while stirring at 90° C. for 6 hours.
After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 16.2 g of Compound 84 (yield 64.3%). LC/MS: m/z=579[(M)+]
Intermediate 58-1 (10.0 g, 0.044 mol), B-[5-(9,9-Dimethyl-9H-fluoren-2-yl)[1,1′-biphenyl]-3-yl]boronic acid (40.7 g, 0.104 mol), K2CO3 (36.0 g, 0.261 mol), Pd(OAc)2 (5.1 g, 0.002 mol), X-Phos (2.1 g, 0.004 mol), THF 200 mL, and H2O 50 mL were added and reacted while stirring at 90° C. for 6 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and the column and recrystallized to obtain 22.8 g of Compound 101 (yield 61.7%).
LC/MS: m/z=850[(M)+]
1,4-Dibromo-2,5-dichlorobenzene (10.0 g, 0.033 mol), 2-Pyrrolidinone (6.7 g, 0.079 mol), K3PO4 (41.8 g, 0.197 mol), Pd(dba)2 (1.9 g, 0.003 mol), Xant-Phos (13.7 g, 0.024 mol), and dioxane were added and reacted while stirring under reflux for 16 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 6.2 g of Intermediate 112-1 (yield 60.3%).
Intermediate 112-1 (10.0 g, 0.032 mol), 2-Trifluoromethylbenzeneboronic acid (14.6 g, 0.077 mol), K2CO3 (26.5 g, 0.192 mol), Pd(OAc)2 (3.7 g, 0.003 mol), X-Phos (1.5 g, 0.003 mol), THF 200 mL, and H2O 50 mL were added and reacted while stirring at 90° C. for 6 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 10.7 g of Compound 112 (yield 62.9%).
LC/MS: m/z=532[(M)+]
1-Bromo-2-chlorobenzene (10.0 g, 0.052 mol), Bis(pinacolato)diboron (15.9 g, 0.063 mol), KOAc (15.4 g, 0.157 mol), and Pd(dppf)Cl2 (1.9 g, 0.003 mol) were added with dioxane 200 mL and reacted while stirring at 100° C. for 12 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then columned to obtain 8.2 g of Intermediate 124-1 (yield 65.8%).
Intermediate 124-1 (10.0 g, 0.042 mol), 2-Chloro-6-(trifluoromethyl)pyridine (9.1 g, 0.050 mol), K2CO3 (17.4 g, 0.126 mol), and Pd(PPh3)4 (1.0 g, 0.0008 mol) were added with toluene 200 mL, ethanol 50 mL, and H2O 50 mL and reacted while stirring at 100° C. for 6 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then columned to obtain 6.6 g of Intermediate 124-2 (yield 61.1%).
Intermediate 124-2 (10.0 g, 0.039 mol), Bis(pinacolato)diboron (11.8 g, 0.047 mol), KOAc (11.4 g, 0.116 mol), Pd(dppf)Cl2 (1.4 g, 0.002 mol), and XPhos (5.6 g, 0.012 mol) were added with dioxane 200 mL and reacted while stirring at 100° C. for 12 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 9.7 g of Intermediate 124-3 (yield 71.6%).
Intermediate 112-1 (10.0 g, 0.032 mol), Intermediate 124-3 (26.8 g, 0.077 mol), K2CO3 (22.1 g, 0.160 mol), Pd(OAc)2 (3.7 g, 0.003 mol), X-Phos (1.5 g, 0.003 mol), THF 200 mL, and H2O 50 mL were added and reacted while stirring at 90° C. for 6 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 12.8 g of Compound 124 (yield 58.4%).
LC/MS: m/z=686[(M)+]
Intermediate 112-1 (10.0 g, 0.032 mol), [2-(Pyridin-3-yl)phenyl]boronic acid (15.3 g, 0.077 mol), K2CO3 (22.1 g, 0.160 mol), Pd(OAc)2 (3.7 g, 0.003 mol), X-Phos (1.5 g, 0.003 mol), THF 200 mL, and H2O 50 mL were added and reacted while stirring at 90° C. for 6 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and the column and recrystallized to obtain 11.5 g of Compound 136 (yield 65.4%).
LC/MS: m/z=550[(M)+]
1,3,5-Tribromobenzene (10.0 g, 0.032 mol), 2-Pyrrolidinone (9.7 g, 0.114 mol), K3PO4 (60.7 g, 0.286 mol), Pd(dba)2 (2.7 g, 0.005 mol), Xant-Phos (29.8 g, 0.052 mol), and dioxane were added and reacted while stirring under reflux for 16 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 7.2 g of Compound 164 (yield 69.2%).
LC/MS: m/z=731[(M)+]
2,3,5,6-Tetrabromobenzene (10.0 g, 0.025 mol), 2-Pyrrolidinone (10.4 g, 0.122 mol), K3PO4 (64.7 g, 0.305 mol), Pd(dba)2 (2.9 g, 0.005 mol), Xant-Phos (42.3 g, 0.073 mol), and dioxane were added and reacted while stirring under reflux for 16 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 5.8 g of Compound 165 (yield 55.6%).
LC/MS: m/z=410[(M)+]
1,3-Dibromo-5-chlorobenzene (10.0 g, 0.037 mol), Aziridinone (5.1 g, 0.089 mol), K3PO4 (47.1 g, 0.222 mol), Pd(dba)2 (2.1 g, 0.004 mol), Xant-Phos (15.4 g, 0.027 mol), and dioxane were added and reacted while stirring under reflux for 16 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then columned to obtain 6.8 g of Intermediate 224-1 (yield 82.6%).
1-Bromo-3′,5′-bis(trifluoromethyl)-1,1′-biphenyl (10.0 g, 0.027 mol), Bis(pinacolato)diboron (8.3 g, 0.033 mol), KOAc (8.0 g, 0.081 mol), and Pd(dppf)Cl2 (1.0 g, 0.001 mol) were added with dioxane 200 mL and reacted while stirring at 100° C. for 12 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 8.1 g of Intermediate 224-2 (yield 71.8%).
Intermediate 224-1 (10.0 g, 0.045 mol), Intermediate 224-2 (22.4 g, 0.054 mol), K2CO3 (18.6 g, 0.135 mol), Pd(OAc)2 (2.6 g, 0.002 mol), X-Phos (2.1 g, 0.005 mol), THF 200 mL, and H2O 50 mL were added and reacted while stirring at 90° C. for 6 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 16.2 g of Compound 224 (yield 75.7%).
LC/MS: m/z=476[(M)+]
1-Bromo-3,5-dichlorobenzene (10.0 g, 0.044 mol), 2-Piperidone (5.3 g, 0.053 mol), K3PO4 (28.2 g, 0.133 mol), Pd(dba)2 (1.3 g, 0.002 mol), Xant-Phos (4.6 g, 0.008 mol), and dioxane 50 mL were added and reacted while stirring under reflux for 16 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then columned to obtain 8.5 g of Intermediate 396-1 (yield 78.7%).
2,5-Dibromopyridine (10.0 g, 0.042 mol), 2-Trifluoromethylbenzeneboronic acid (9.6 g, 0.051 mol), K2CO3 (17.5 g, 0.127 mol), and Pd(PPh3)4 (1.0 g, 0.0008 mol) were added with toluene 200 mL, ethanol 50 mL, and H2O 50 mL and reacted while stirring at 100° C. for 6 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then columned to obtain 9.3 g of Intermediate 396-2 (yield 72.9%).
Intermediate 396-2 (10.0 g, 0.033 mol), Bis(pinacolato)diboron (10.1 g, 0.040 mol), KOAc (9.8 g, 0.099 mol), and Pd(dppf)Cl2 (1.2 g, 0.002 mol) were added with dioxane 200 mL and reacted while stirring at 100° C. for 12 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 8.6 g of Intermediate 396-3 (yield 74.4%).
Intermediate 396-1 (10.0 g, 0.041 mol), Intermediate 396-3 (34.3 g, 0.098 mol), K2CO3 (28.3 g, 0.205 mol), Pd(OAc)2 (4.7 g, 0.004 mol), X-Phos (2.0 g, 0.004 mol), THF 200 mL, and H2O 50 mL were added and reacted while stirring at 90° C. for 6 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and the column and recrystallized to obtain 17.4 g of Compound 396 (yield 68.8%).
LC/MS: m/z=617[(M)+]
2,4,5-Trichlorobromobenzene (10.0 g, 0.038 mol), 2-Piperidone (4.6 g, 0.046 mol), K3PO4 (24.5 g, 0.115 mol), Pd(dba)2 (1.1 g, 0.002 mol), Xant-Phos (4.0 g, 0.007 mol), and dioxane 50 mL were added and reacted while stirring under reflux for 16 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 12.1 g of Intermediate 422-1 (yield 87.4%).
Intermediate 422-2 (10.0 g, 0.036 mol), 3,5-Di-tert-butylphenylboronic Acid (30.3 g, 0.129 mol), K2CO3 (39.7 g, 0.287 mol), Pd(OAc)2 (6.2 g, 0.005 mol), X-Phos (2.6 g, 0.005 mol), THF 200 mL, and H2O 50 mL were added and reacted while stirring at 90° C. for 6 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 14.2 g of Compound 422 (yield 53.4%).
LC/MS: m/z=740[(M)+]
1,2,4-Tribromo-5-chlorobenzene (10.0 g, 0.029 mol), 2-Piperidone (10.2 g, 0.103 mol), K3PO4 (54.7 g, 0.258 mol), Pd(dba)2 (2.5 g, 0.004 mol), Xant-Phos (26.8 g, 0.046 mol), and dioxane were added and reacted while stirring under reflux for 16 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 9.2 g of Intermediate 439-1 (yield 79.6%).
Intermediate 439-1 (10.0 g, 0.025 mol), 4-Pyridinylboronic acid (3.7 g, 0.030 mol), K2CO3 (10.3 g, 0.074 mol), Pd(OAc)2 (1.4 g, 0.001 mol), X-Phos (1.2 g, 0.003 mol), THF 200 mL, and H2O 50 mL were added and reacted while stirring at 90° C. for 6 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 7.2 g of Compound 439 (yield 65.2%).
LC/MS: m/z=446[(M)+]
2,4,5-Trichlorobromobenzene (10.0 g, 0.038 mol), 2-Azetidinone (3.3 g, 0.046 mol), K3PO4 (24.5 g, 0.115 mol), Pd(dba)2 (1.1 g, 0.002 mol), Xant-Phos (4.0 g, 0.007 mol), and dioxane 50 mL were added and reacted while stirring under reflux for 16 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 8.6 g of Intermediate 470-1 (yield 89.4%).
Intermediate 470-1 (10.0 g, 0.040 mol), 3-Dibenzofuranboronic acid (30.5 g, 0.144 mol), K2CO3 (49.7 g, 0.359 mol), Pd(OAc)2 (6.9 g, 0.006 mol), X-Phos (2.9 g, 0.006 mol), THF 200 mL, and H2O 50 mL were added and reacted while stirring at 90° C. for 6 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and the column and recrystallized to obtain 10.1 g of Compound 470 (yield 73.1%).
LC/MS: m/z=667[(M)+]
4-tert-Butylaniline (10.0 g, 0.067 mol), 1-Bromo-2-(trifluoromethyl)benzene (22.6 g, 0.101 mol), NaOtBu (12.9 g, 0.134 mol), Pd(dba)2 (1.9 g, 3.4 mmol), and t-Bu3P (1.4 g, 6.7 mmol) were added with Toluene 150 mL and reacted while stirring at 70° C. for 4 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 12.8 g of Intermediate 502-1 (yield 65.1%).
Intermediate 58-1 (10.0 g, 0.044 mol), Intermediate 502-1 (38.3 g, 0.130 mol), NaOtBu (16.7 g, 0.174 mol), Pd(dba)2 (2.5 g, 4.3 mmol), and t-Bu3P (1.8 g, 8.7 mmol) were added with Toluene 150 mL and reacted while stirring at 70° C. for 4 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 20.3 g of Compound 502 (yield 62.8%).
LC/MS: m/z=743[(M)+]
2-(Trifluoromethyl) aniline (10.0 g, 0.062 mol), 1-Bromo-2-(trifluoromethyl)benzene (21.0 g, 0.093 mol), NaOtBu (11.9 g, 0.124 mol), Pd(dba)2 (1.8 g, 3.1 mmol), and t-Bu3P (1.3 g, 6.2 mmol) were added with Toluene 150 mL and reacted while stirring at 70° C. for 4 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 10.8 g of Intermediate 518-1 (yield 57.0%).
Intermediate 112-1 (10.0 g, 0.032 mol), Intermediate 518-1 (29.3 g, 0.096 mol), NaOtBu (12.3 g, 0.128 mol), Pd(dba)2 (1.8 g, 3.2 mmol), and t-Bu3P (1.3 g, 6.4 mmol) were added with Toluene 150 mL and reacted while stirring at 70° C. for 4 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 13.3 g of Compound 518 (yield 49.0%).
LC/MS: m/z=850[(M)+]
N-[3,5-Bis(trifluoromethyl)phenyl]-3,5-bis(trifluoromethyl)benzenamine (10.0 g, 0.023 mol), Bis(3,5-dimethylphenyl)amine (9.6 g, 0.034 mol), NaOtBu (4.4 g, 0.045 mol), Pd(dba)2 (0.7 g, 1.1 mmol), and t-Bu3P (0.5 g, 2.3 mmol) were added with Toluene 150 mL and reacted while stirring at 70° C. for 4 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then columned to obtain 7.5 g of Intermediate 551-1 (yield 55.5%).
Intermediate 551-1 (10.0 g, 0.017 mol), Bis(pinacolato)diboron (5.1 g, 0.020 mol), KOAc (4.9 g, 0.050 mol), and Pd(dppf)Cl2 (0.6 g, 0.001 mol) were added with dioxane 200 mL and reacted while stirring at 100° C. for 12 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 7.7 g of Intermediate 551-2 (yield 71.4%).
Intermediate 439-1 (10.0 g, 0.025 mol), Intermediate 551-2 (19.1 g, 0.030 mol), K2CO3 (10.3 g, 0.074 mol), Pd(OAc)2 (1.4 g, 0.001 mol), X-Phos (1.2 g, 0.003 mol), THF 200 mL, and H2O 50 mL were added and reacted while stirring at 90° C. for 6 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and the column and recrystallized to obtain 13.6 g of Compound 551 (yield 62.1%).
LC/MS: m/z=884[(M)+]
2,4-Dichlorobromobenzene (10.0 g, 0.044 mol), pyrrolidin-2-one (4.5 g, 0.053 mol), K3PO4 (28.2 g, 0.133 mol), Pd(dba)2 (1.3 g, 0.002 mol), Xant-Phos (4.6 g, 0.008 mol), and dioxane were added and reacted while stirring under reflux for 16 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 8.5 g of Intermediate 563-1 (yield 83.5%).
Intermediate 563-1 (10.0 g, 0.044 mol), 3,5-Bis(trifluoromethyl)phenylboronic acid (26.9 g, 0.104 mol), K2CO3 (36.0 g, 0.261 mol), Pd(OAc)2 (5.0 g, 0.004 mol), X-Phos (4.1 g, 0.009 mol), THF 200 mL, and H2O 50 mL were added and reacted while stirring at 90° C. for 6 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and the column and recrystallized to obtain 14.5 g of Compound 563 (yield 57.0%).
LC/MS: m/z=585[(M)+]
1-Bromo-2,3,5-trichlorobenzene (10.0 g, 0.038 mol), pyrrolidin-2-one (3.9 g, 0.046 mol), K3PO4 (24.5 g, 0.115 mol), Pd(dba)2 (1.1 g, 0.002 mol), Xant-Phos (4.0 g, 0.007 mol), and dioxane were added and reacted while stirring under reflux for 16 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 7.9 g of Intermediate 575-1 (yield 77.8%).
Intermediate 575-1 (10.0 g, 0.038 mol), 2-(Trifluoromethyl)phenylboronic acid (25.9 g, 0.136 mol), K2CO3 (47.0 g, 0.340 mol), Pd(OAc)2 (6.6 g, 0.006 mol), X-Phos (3.6 g, 0.008 mol), THF 200 mL, and H2O 50 mL were added and reacted while stirring at 90° C. for 6 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 12.7 g of Compound 575 (yield 56.6%).
LC/MS: m/z=593[(M)+]
1-Chloro-2,3-dibromobenzene (10.0 g, 0.037 mol), pyrrolidin-2-one (7.6 g, 0.089 mol), K3PO4 (47.1 g, 0.222 mol), Pd(dba)2 (2.1 g, 0.004 mol), Xant-Phos (15.4 g, 0.027 mol), and dioxane were added and reacted while stirring under reflux for 16 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 6.3 g of Intermediate 575-1 (yield 61.1%).
Intermediate 604-1 (10.0 g, 0.036 mol), N-[3,5-Bis(trifluoromethyl)phenyl]-3,5-bis(trifluoromethyl)benzenamine (23.7 g, 0.054 mol), NaOtBu (6.9 g, 0.072 mol), Pd(dba)2 (1.0 g, 1.8 mmol), and t-Bu3P (0.7 g, 3.6 mmol) were added with Toluene 150 mL and reacted while stirring at 70° C. for 4 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 10.5 g of Compound 604 (yield 42.8%).
LC/MS: m/z=683[(M)+]
1,4-Dibromo-2,6-dichlorobenzene (10.0 g, 0.033 mol), pyrrolidin-2-one (6.7 g, 0.079 mol), K3PO4 (41.8 g, 0.197 mol), Pd(dba)2 (1.9 g, 0.003 mol), Xant-Phos (13.7 g, 0.024 mol), and dioxane were added and reacted while stirring under reflux for 16 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 8.1 g of Intermediate 629-1 (yield 78.8%).
Intermediate 629-1 (10.0 g, 0.032 mol), N-[3,5-Bis(trifluoromethyl)phenyl]-3,5-bis(trifluoromethyl)benzenamine (42.3 g, 0.096 mol), NaOtBu (12.3 g, 0.128 mol), Pd(dba)2 (1.8 g, 3.2 mmol), and t-Bu3P (1.3 g, 6.4 mmol) were added with Toluene 150 mL and reacted while stirring at 70° C. for 4 hours. After completion of the reaction, the reaction mixture was extracted, concentrated, and then column and recrystallized to obtain 15.4 g of Compound 629 (yield 43.0%).
LC/MS: m/z=1122[(M)+]
In Example according to the present invention, an Ag-containing ITO glass substrate having dimensions of 25 mm×25 mm×0.7 mm was used as an anode, patterned to have a light emitting area of 2 mm×2 mm, followed by cleaning. After the patterned ITO substrate was mounted in a vacuum chamber, organic materials and metals were deposited in the following structure on the substrate at a process pressure of 1×10−6 torr or more.
The compound implemented according to the present invention was employed in the light efficiency improving layer to fabricate an organic light emitting device having the following device structure, and then the luminescent and driving properties according to the compound implemented according to the present invention were measured.
Ag:ITO/hole injecting layer (HAT-CN, 5 nm)/hole transport layer (α-NPB, 100 nm)/electron blocking layer (TCTA, 10 nm)/light emitting layer (20 nm)/electron transport layer (201:Liq, 30 nm)/LiF (1 nm)/Mg:Ag (15 nm)/light efficiency improving layer (70 nm)
On a glass substrate, HAT-CN was formed into a 5 nm-thick film to form a hole injecting layer on an Ag-containing ITO transparent electrode. Thereafter, α-NPB was formed into a 100 nm-thick film to form a hole transport layer, and then TCTA was formed into a 10 nm-thick film to form an electron blocking layer. Thereafter, a light emitting layer was formed by co-depositing BH1 as a host compound and BD1 as a dopant compound to a thickness of 20 nm. Thereafter, a 30 nm-thick electron transport layer (doped with Liq 50% of the following Compound 201) was deposited, and then LiF was formed into a 1 nm-thick film to form an electron injection layer. Thereafter, Mg:Ag was formed into a 15 nm-thick film at a ratio of 1:9 to form a cathode. In addition, the light efficiency improving layer (capping layer) was formed to a 70 nm-thick film using the compounds according to the present invention shown in Table 1 below to fabricate an organic light emitting device.
An organic light emitting device for Device Comparative Example 1 was fabricated in the same method, except for not using the light efficiency improving layer in the device structure of Example above.
An organic light emitting device for Device Comparative Example 2 was fabricated in the same method, except for using Alq3 instead of the compound according to the present invention as the light efficiency improving layer compound in the device structure of Example above.
The driving voltages, current efficiencies, and color coordinates of the organic light emitting devices fabricated in Examples and Comparative Examples above were measured using a source meter (Model 237, Keithley) and a spectroradiometer (PR-650, Photo Research). The result values at 1,000 nits were shown in Table 1 below.
As described in the results shown in Table 1 above, it was confirmed that when the compound according to the present invention was applied to a device as a light efficiency improving layer, the device had reduced driving voltage and improved current efficiency compared to a conventional device without a light efficiency improving layer and a conventional device using a compound used as a light efficiency improving layer material (Comparative Examples 1 and 2).
According to the present invention, an organic compound is employed as a material for a light efficiency improving layer provided in an organic light emitting 5 device to achieve low-voltage driving and improved luminescent properties such as excellent luminous efficiency, color purity, etc. by increasing the light efficiency of the organic light emitting device, and thus the present invention can be effectively used industrially in various lighting and display devices.
Number | Date | Country | Kind |
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10-2021-0098356 | Jul 2021 | KR | national |
Filing Document | Filing Date | Country | Kind |
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PCT/KR2021/013095 | 9/27/2021 | WO |