Light emitting device and method of manufacturing the same
First Claim
1. A light emitting device having an anode, a cathode, and a layer comprising at least one organic compound, wherein the layer comprising at least one organic compound is interposed between the anode and the cathode, wherein the anode has a light-shielding ability and contains an element that belongs to one of Group 4, 5, and 6 in the periodic table, and wherein the cathode comprises a light-transmissive conductive film.
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Accused Products
Abstract
A measure for improving the light emission efficiency of a light emitting element without degrading characteristics of anode materials used in prior art is provided in manufacture of an upward emission type light emitting element. The present invention is characterized in that nitride or carbide of a metal element belonging to one of Group 4, 5, and 6 in the periodic table (hereinafter referred to as metal compound) is used as the material for forming an anode of a light emitting element. The metal compound has a work function equal to or larger than the work function of conventional anode materials. Therefore, injection of holes from the anode can be improved ever more. Also, with regard to conductivity, the metal compound is smaller in resistivity than ITO. It therefore can fulfil the function as a wire and can lower the drive voltage in the light emitting element compared to prior art.
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Citations
38 Claims
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1. A light emitting device having an anode, a cathode, and a layer comprising at least one organic compound,
wherein the layer comprising at least one organic compound is interposed between the anode and the cathode, wherein the anode has a light-shielding ability and contains an element that belongs to one of Group 4, 5, and 6 in the periodic table, and wherein the cathode comprises a light-transmissive conductive film.
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6. A light emitting device having an anode, a cathode, and a layer comprising at least one organic compound,
wherein the layer comprising at least one organic compound is interposed between the anode and the cathode, wherein the anode has a light-shielding ability and comprises one of nitride and carbide of an element that belongs to one of Group 4, 5, and 6 in the periodic table, and wherein the cathode comprises a light-transmissive conductive film.
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11. A light emitting device having a TFT provided on an insulating surface and a light emitting element,
wherein the light emitting element has an anode, a cathode, and a layer comprising at least one organic compound, wherein the TFT is electrically connected to the anode, and wherein the anode contains an element that belongs to one of Group 4, 5, and 6 in the periodic table.
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17. A light emitting device having a TFT provided on an insulating surface and a light emitting element,
wherein the light emitting element has an anode, a cathode, and a layer comprising at least one organic compound, wherein the TFT is electrically connected to the anode, and wherein the anode comprises one of nitride and carbide of an element that belongs to one of Group 4, 5, and 6 in the periodic table.
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23. A method of manufacturing a light emitting device comprising:
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forming an anode on an insulating surface;
subjecting a surface of the anode to UV ozone treatment;
forming a layer comprising at least one organic compound on the anode; and
forming a cathode on the layer comprising at least one organic compound, wherein the anode contains an element that belongs to one of Group 4, 5, and 6 in the periodic table. - View Dependent Claims (24)
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25. A method of manufacturing a light emitting device comprising:
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forming an anode on an insulating surface;
subjecting a surface of the anode to UV ozone treatment;
forming a layer comprising at least one organic compound on the anode; and
forming a cathode on the layer comprising at least one organic compound, wherein the anode is formed of one of nitride and carbide of an element that belongs to one of Group 4, 5, and 6 in the periodic table. - View Dependent Claims (26)
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27. A method of manufacturing a light emitting device comprising:
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forming an anode on an insulating surface;
subjecting a surface of the anode to UV ozone treatment;
forming a layer comprising at least one organic compound on the anode; and
forming a cathode on the layer comprising at least one organic compound, wherein the anode has a light-shielding ability and contains an element that belongs to one of Group 4, 5, and 6 in the periodic table, and wherein the cathode is formed from a light-transmissive conductive film. - View Dependent Claims (28)
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29. A method of manufacturing a light emitting device comprising:
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forming an anode on an insulating surface;
subjecting a surface of the anode to UV ozone treatment;
forming a layer comprising at least one organic compound on the anode; and
forming a cathode on the layer comprising at least one organic compound, wherein the anode has a light-shielding ability and comprising one of nitride and carbide of an element that belongs to one of Group 4, 5, and 6 in the periodic table, and wherein the cathode is formed from a light-transmissive conductive film. - View Dependent Claims (30)
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31. A method of manufacturing a light emitting device comprising:
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forming an anode on an insulating surface;
subjecting a surface of the anode to plasma treatment;
forming a layer comprising at least one organic compound on the anode; and
forming a cathode on the layer comprising at least one organic compound, wherein the anode contains an element that belongs to one of Group 4, 5, and 6 in the periodic table. - View Dependent Claims (32)
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33. A method of manufacturing a light emitting device comprising:
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forming an anode on an insulating surface;
subjecting a surface of the anode to plasma treatment;
forming a layer comprising at least one organic compound on the anode; and
forming a cathode on the layer comprising at least one organic compound, wherein the anode comprises one of nitride and carbide of an element that belongs to one of Group 4, 5, and 6 in the periodic table. - View Dependent Claims (34)
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35. A method of manufacturing a light emitting device comprising:
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forming an anode on an insulating surface;
subjecting a surface of the anode to plasma treatment;
forming an organic compound layer on the anode; and
forming a cathode on the organic compound layer, wherein the anode has a light-shielding ability and contains an element that belongs to one of Group 4, 5, and 6 in the periodic table, and wherein the cathode comprises a light-transmissive conductive film.
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37. A method of manufacturing a light emitting device comprising:
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forming an anode on an insulating surface;
subjecting a surface of the anode to plasma treatment;
forming a layer comprising at least one organic compound on the anode; and
forming a cathode on the layer comprising at least one organic compound, wherein the anode has a light-shielding ability and comprises one of nitride and carbide of an element that belongs to one of Group 4, 5, and 6 in the periodic table, and wherein the cathode comprises a light-transmissive conductive film. - View Dependent Claims (36)
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38. A method according to claim 38, wherein said anode is electrically connected to a TFT that is formed over a substrate.
Specification