Organic light emitting display device and method of fabricating the same
View Patent ↗An organic light emitting display device (OLED), which does not include a separate cathode, and a method of fabricating the same, are provided. The OLED includes: a substrate; a reflective layer disposed on the substrate; a charge generation layer disposed on the reflective layer; an organic layer disposed on the charge generation layer and including an emission layer; and an anode disposed on the organic layer.
1. An organic light emitting display device (OLED), comprising:
a substrate;
a reflective layer disposed on the substrate;
a charge generation layer disposed on the reflective layer to generate electrons and holes;
an organic layer disposed on the charge generation layer and including an emission layer; and
an anode disposed on the organic layer.
2. The OLED according to claim 1 , wherein the reflective layer is formed of aluminum, silver, or an alloy thereof.
3. The OLED according to claim 1 , wherein the charge generation layer comprises a plurality of layers.
4. The OLED according to claim 1 , wherein the charge generation layer is formed to a thickness of 70 to 2000 Å.
5. The OLED according to claim 1 , wherein the organic layer comprises at least one layer selected from a group consisting of a hole injection layer, a hole transport layer, a hole blocking layer, an electron transport layer, and an electron injection layer.
6. The OLED according to claim 3 , wherein the plurality of layers comprise an inorganic compound layer, and a mixed layer of an electron transport layer material and a metal dopant.
7. The OLED according to claim 6 , wherein the inorganic compound layer is formed to a thickness of 20 to 1000 Å.
8. The OLED according to claim 6 , wherein the inorganic compound layer is formed of one selected from a group consisting of tungsten oxide (WO 3 ), vanadium oxide (V 2 O 5 ), molybdenum oxide (MoO x ), beryllium oxide (Be 2 O 3 ), rhenium oxide (Re 2 O 7 ), ferric chloride (FeCl 3 ), ferric bromide (FeBr 3 ), ferric iodide (FeI 3 ), aluminum chloride (AlCl 3 ), aluminum bromide (AlBr 3 ), gallium chloride (GaCl 3 ), gallium bromide (GaBr 3 ), gallium iodide (GaI 3 ), indium chloride (InCl 3 ), indium bromide (InBr 3 ), indium iodide (InI 3 ), antimony pentachloride (SbCl 5 ), arsenic pentafluoride (AsF 5 ), arsenic trifluoride (AsF 3 ), and boron trifluoride (BF 3 ).
9. The OLED according to claim 6 , wherein the mixed layer is formed to a thickness of 50 to 1000 Å.
10. The OLED according to claim 6 , wherein the electron transport layer material comprises one selected from a group consisting of a quinoline derivative, a benzoquinoline derivative, an oxazole-based ligand, a thiazole-based ligand, an oxadiazole derivative, and a phenanthroline derivative.
11. The OLED according to claim 6 , wherein the metal dopant comprises one selected from magnesium, cesium, and lithium.
12. An organic light emitting display device (OLED), comprising:
a substrate;
a semiconductor layer disposed on the substrate;
a gate insulating layer disposed on an entire surface of the substrate including the semiconductor layer;
a gate electrode disposed in a region corresponding to the semiconductor layer on the gate insulating layer;
an interlayer insulating layer disposed on the entire surface of the substrate including the gate electrode;
source and drain electrodes disposed on the interlayer insulating layer, and electrically connected to the semiconductor layer;
a passivation layer disposed on the entire surface of the substrate including the source and drain electrodes;
a planarization layer disposed on the passivation layer;
a reflective layer disposed on the planarization layer;
a charge generation layer disposed on the substrate including the reflective layer, and
electrically connected to the source or drain electrode, and to generate electrons and holes;
an organic layer disposed on the charge generation layer, and including an emission layer; and
an anode disposed on the organic layer.
13. The OLED according to claim 12 , wherein the reflective layer is formed of aluminum, silver, or an alloy thereof.
14. The OLED according to claim 12 , wherein the charge generation layer comprises a plurality of layers.
15. The OLED according to claim 12 , wherein the charge generation layer is formed to a thickness of 70 to 2000 Å.
16. The OLED according to claim 12 , wherein the organic layer comprises at least one layer selected from a group consisting of a hole injection layer, a hole transport layer, a hole blocking layer, an electron transport layer, and an electron injection layer.
17. The OLED according to claim 14 , wherein the plurality of layers comprise an inorganic compound layer, and a mixed layer of an electron transport layer material and a metal dopant.
18. The OLED according to claim 17 , wherein the inorganic compound layer is formed to a thickness of 20 to 1000 Å.
19. The OLED according to claim 17 , wherein the inorganic compound layer is formed of one selected from a group consisting of tungsten oxide (WO 3 ), vanadium oxide (V 2 O 5 ), molybdenum oxide (MoO x ), beryllium oxide (Be 2 O 3 ), rhenium oxide (Re 2 O 7 ), ferric chloride (FeCl 3 ), ferric bromide (FeBr 3 ), ferric iodide (FeI 3 ), aluminum chloride (AlCl 3 ), aluminum bromide (AlBr 3 ), gallium chloride (GaCl 3 ), gallium bromide (GaBr 3 ), gallium iodide (GaI 3 ), indium chloride (InCl 3 ), indium bromide (InBr 3 ), indium iodide (InI 3 ), antimony pentachloride (SbCl 5 ), arsenic pentafluoride (AsF 5 ), arsenic trifluoride (AsF 3 ), and boron trifluoride (BF 3 ).
20. The OLED according to claim 17 , wherein the mixed layer is formed to a thickness of 50 to 1000 Å.
21. The OLED according to claim 17 , wherein the electron transport layer material comprises one selected from a group consisting of a quinoline derivative, a benzoquinoline derivative, an oxazole-based ligand, a thiazole-based ligand, an oxadiazole derivative, and a phenanthroline derivative.
22. The OLED according to claim 17 , wherein the metal dopant comprises one selected from magnesium, cesium, and lithium.