Organic electroluminescent element and manufacturing method of an organic electroluminescent element and a display

Abstract

One embodiment of the present invention is an organic electroluminescent element including a first electrode, a second electrode, an organic luminescent medium layer including an organic luminescent layer and one or more other layer, wherein the first electrode faces the second electrode, wherein the organic luminescent medium layer is between the first electrode and the second electrode, and wherein an inorganic barrier layer is between the organic luminescent medium layer.

Description

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is an explanatory drawing which shows an example of an organic electroluminescent element of the present invention.

FIG. 2 is an explanatory drawing which shows an example of an organic electroluminescent element of the present invention.

FIG. 3 is an explanatory drawing which shows an example of an organic electroluminescent element of the present invention.

FIG. 4 is an explanatory drawing which shows an example of letterpress printing machine used for the present invention.

FIG. 5 is an explanatory drawing which shows an example of a display of the present invention.

FIG. 6 is a sectional drawing which shows an organic electroluminescent element of one embodiment of the present invention.

Claims

1. An organic electroluminescent element comprising a first electrode, a second electrode, an organic luminescent medium layer including an organic luminescent layer and an inorganic barrier layer, wherein the first electrode faces the second electrode,wherein the organic luminescent medium layer is between the first electrode and the second electrode,and wherein the inorganic barrier layer is contained with the organic luminescent medium layer.

2. The organic electroluminescent element according to claim 1, wherein the inorganic barrier layer comprises an insulating material or a semi-conductor comprising oxide, nitride and fluoride, or a metal having a work function that is equal to or more than 4.0 eV.

3. The organic electroluminescent element according to claim 1, wherein the thickness of the inorganic barrier layer is 0.1 nm-1.0 nm.

4. The organic electroluminescent element according to claim 1, wherein the organic luminescent medium layer includes an electron injection layer.

5. A manufacturing method for an organic electroluminescent element including a first electrode, a second electrode, an organic luminescent medium layer including an organic luminescent layer, wherein the first electrode faces the second electrode,wherein the organic luminescent medium layer is between the first electrode and the second electrode,said method comprising forming an organic luminescent medium layer on the first electrode in atmospheric air,next forming a barrier layer, andnext forming another organic luminescent medium layer in vacuum condition.

6. The manufacturing method of an organic electroluminescent element according to claim 5, wherein the barrier layer is an inorganic barrier layer.

7. The manufacturing method of an organic electroluminescent element according to claim 5, wherein the barrier layer comprises an insulating material or a semi-conductor comprising oxide, nitride and fluoride, or a metal having a work function that is equal to or more than 4.0 eV.

8. The manufacturing method of an organic electroluminescent element according to claim 5, wherein the thickness of the barrier layer is 0.1 nm-1.0 nm.

9. The manufacturing method of an organic electroluminescent element according to claim 5, whrein forming an organic luminescent medium layer on the first electrode in atmospheric air is performed by letterpress printing.

10. The manufacturing method of an organic electroluminescent element according to claim 5, wherein the another organic luminescent medium layer is an electron injection layer.

11. An organic electroluminescent element manufactured by the method according to claim 5.

12. A display having an organic electroluminescent element according to claim 1 as a display device.

13. A display having an organic electroluminescent element according to claim 11 as a display device.

14. An organic electroluminescent element comprising a transparent first electrode, a second electrode facing the first electrode, an organic luminescent medium layer including an organic charge injection layer, an organic luminescent layer between the first electrode and the second electrode, and an ion blocking barrier layer, wherein the ion blocking barrier layer includes an inorganic material and is disposed between the organic charge injection layer and the organic luminescent layer.

15. An organic electroluminescent element according to claim 14, wherein the organic charge injection layer includes an ionic material.

16. An organic electroluminescent element according to claim 14, wherein the organic charge injection layer comprises a mixture of poly (3,4-ethylenedioxy thiophen) and polystyrene sulfonate (PEDOT-PSS) or Polyaniline (PANI), to which an ionic dopant is added.

17. An organic electroluminescent element according to claim 14, wherein the thickness of the ion blocking barrier layer is equal to or less than 10 nm.

18. An organic electroluminescent element according to claim 14, wherein the organic charge injection layer is a hole injection layer.

19. An organic electroluminescent element according to claim 14, wherein a work function of the inorganic material included in the ion blocking barrier layer is 4.5-5.5 eV.4