Electronic appliance and light-emitting device
First Claim
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1. A light-emitting device comprising:
- a first electrode;
a first composite layer formed over the first electrode, the first composite layer including a first metal oxide and a first organic compound;
a light emitting layer comprising an organic material formed over the first composite layer;
a second composite layer formed over the light emitting layer, the second composite layer including a second metal oxide and a second organic compound; and
a second electrode formed over the second composite layer.
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Abstract
An EL element having a novel structure is provided, which is suitable for AC drive. A light-emitting element of the invention is provided with material layers (material layers each having approximately symmetric I-V characteristics with respect to the zero point in a graph having the abscissa axis showing current values and the ordinate axis showing voltage values) between a first electrode and a layer including an organic compound and between the layer including the organic compound and a second electrode respectively. Specifically, each of the material layers is a composite layer including a metal oxide and an organic compound.
40 Citations
26 Claims
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1. A light-emitting device comprising:
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a first electrode; a first composite layer formed over the first electrode, the first composite layer including a first metal oxide and a first organic compound; a light emitting layer comprising an organic material formed over the first composite layer; a second composite layer formed over the light emitting layer, the second composite layer including a second metal oxide and a second organic compound; and a second electrode formed over the second composite layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A light-emitting device comprising:
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a first electrode; a first composite layer formed over the first electrode, the first composite layer including a first metal oxide and a first organic compound; a light emitting layer comprising an organic material formed over the first composite layer; a second composite layer formed over the light emitting layer, the second composite layer including a second metal oxide and a second organic compound; and a second electrode formed over the second composite layer, wherein the light emitting layer has a HOMO level and a LUMO level within a bandgap of the first and second metal oxides. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A light-emitting device comprising:
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a first electrode disposed in a stripe form; a first composite layer formed over the first electrode, the first composite layer including a first metal oxide and a first organic compound; a light emitting layer comprising an organic material formed over the first composite layer; a second composite layer formed over the light emitting layer, the second composite layer including a second metal oxide and a second organic compound; and a second electrode formed over the second composite layer, the second electrode being disposed in a stripe form perpendicular to the first electrode, wherein the first electrode is formed using a light-reflective conductive material; and wherein the second electrode is formed using a light-transmissive conductive material. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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Specification