Organic electroluminescent element
First Claim
1. An organic electroluminescent element in which a substrate, a first electrode adjacent to this substrate, an organic layer including at least one organic light-emitting layer, and a second electrode adjacent to this organic layer are formed in this order, whereinat least one of said electrodes is a transparent electrode, which contains at least one type of light scattering particles that are transparent and have a primary particle size of at least 0.5 μ
- m, and which is composed of said light scattering particles and a component having a refractive index equal to or higher than the refractive index of said organic light-emitting layer.
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Abstract
It is an object of the present invention to provide an organic electroluminescent element with which no light extraction layer needs to be produced separately, which has a transparent electrode that is advantageous in terms of cost and can be formed by a simple film formation process, and which is excellent from the standpoint of light extraction efficiency. The present invention provides an organic electroluminescent element in which a substrate, a first electrode adjacent to this substrate, an organic layer including at least one organic light-emitting layer, and a second electrode adjacent to this organic layer are formed in this order, with this organic electroluminescent element being such that at least one of the aforementioned electrodes is a transparent electrode which is transparent, which contains at least one type of light scattering particles that are transparent and that have a primary particle size of at least 0.5 μm, and which is composed of the aforementioned light scattering particles and a component having a refractive index equal to or higher than the refractive index of the aforementioned organic light-emitting layer.
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Citations
13 Claims
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1. An organic electroluminescent element in which a substrate, a first electrode adjacent to this substrate, an organic layer including at least one organic light-emitting layer, and a second electrode adjacent to this organic layer are formed in this order, wherein
at least one of said electrodes is a transparent electrode, which contains at least one type of light scattering particles that are transparent and have a primary particle size of at least 0.5 μ - m, and which is composed of said light scattering particles and a component having a refractive index equal to or higher than the refractive index of said organic light-emitting layer.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 11, 12, 13)
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9. An organic electroluminescent element in which a substrate, a first electrode adjacent to this substrate, an organic layer including at least one organic light-emitting layer, and a second electrode in direct contact with this organic layer are formed in this order, wherein
at least one of said electrodes is a transparent electrode configured from two layers, these two layers both contain a conductive matrix, one of said two layers contains at least one type of light scattering particles that are transparent and have a primary particle size of at least 0.5 μ - m and is composed of said light scattering particles and a component having a refractive index equal to or higher than the refractive index of said organic light-emitting layer, and the other layer does not contain light scattering particles and has a refractive index that is equal to or higher than the refractive index of the organic light-emitting layer.
- View Dependent Claims (10)
Specification