Organic electroluminescent device
First Claim
1. A method for manufacturing an organic electroluminescent device comprising:
- forming a first electrode over a first plastic substrate;
mixing a first organic compound a second organic compound, and a metal particle into a solvent to prepare a first solution;
forming a first electroluminescent layer over the first plastic substrate provided with the first electrode by applying the first solution on the first electrode so that the metal particle is surrounded by a bipolar layer comprising the first organic compound and the second organic compound;
forming a second electrode over a second plastic substrate;
bonding the second plastic substrate provided with the second electrode to the first plastic substrate provided with the first electrode so that the first electroluminescent layer is interposed between the first electrode and the second electrode to form a bonded substrate,wherein a hole transporting property is higher than an electron transporting property in the first organic compound,wherein an electron transporting property is higher than a hole transporting property in the second organic compound,wherein the metal particle injects a hole and an electron to the bipolar layer by applying an alternative current so that the bipolar layer emits light.
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Abstract
An organic EL device that has good yields and high reliability as well as high current efficiency is provided by introducing the new concept to the conventional organic EL device structure. An EL device comprising a first electrode 101, a second electrode 102, an electroluminescent layer 103, conductive particles 104, wherein conductive particles 104 are dispersed in the EL layer 103, is used. Current efficiency will be increased since conductive particles serve as the conventional charge generation layer. In addition, fabricating processes will become simplified and fabricating costs will be reduced because the conductive particles and the EL layer can be formed simultaneously.
78 Citations
10 Claims
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1. A method for manufacturing an organic electroluminescent device comprising:
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forming a first electrode over a first plastic substrate; mixing a first organic compound a second organic compound, and a metal particle into a solvent to prepare a first solution; forming a first electroluminescent layer over the first plastic substrate provided with the first electrode by applying the first solution on the first electrode so that the metal particle is surrounded by a bipolar layer comprising the first organic compound and the second organic compound; forming a second electrode over a second plastic substrate; bonding the second plastic substrate provided with the second electrode to the first plastic substrate provided with the first electrode so that the first electroluminescent layer is interposed between the first electrode and the second electrode to form a bonded substrate, wherein a hole transporting property is higher than an electron transporting property in the first organic compound, wherein an electron transporting property is higher than a hole transporting property in the second organic compound, wherein the metal particle injects a hole and an electron to the bipolar layer by applying an alternative current so that the bipolar layer emits light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for manufacturing an organic electroluminescent device comprising:
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forming a first electrode over a substrate; forming a layer comprising a first organic compound, a second organic compound, and metal particles over the first electrode; and forming a second electrode over the layer, wherein the metal particles are surrounded by a bipolar layer comprising the first organic compound and the second organic compound, wherein a hole transporting property is higher than an electron transporting property in the first organic compound, and wherein an electron transporting property is higher than a hole transporting property in the second organic compound, wherein the metal particle injects a hole and an electron to the bipolar layer by applying an alternative current so that the bipolar layer emits light. - View Dependent Claims (10)
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Specification