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US 6,965,197 B2Granted
Organic light-emitting device having enhanced light extraction efficiency
AssigneeEastman Kodak Company
InventorsYuan-Sheng Tyan, Ching W. Tang, Liang-Sheng Liao
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Abstract
An enhanced light extraction OLED device including a transparent substrate; light scattering layer disposed over a first surface of the transparent substrate; a transparent first electrode layer disposed over the light scattering layer; an organic EL element disposed over the transparent first electrode layer and including one or more organic layers but at least one light emitting layer in which light is produced; and a transparent second electrode layer disposed over the organic EL element.
Claims45
An enhanced light extraction OLED device comprising:
- (a) a transparent substrate;
- (b) a light scattering layer disposed over a first surface of the transparent substrate;
- (c) a transparent first electrode layer disposed over the light scattering layer;
- (d) an organic EL element disposed over the transparent first electrode layer and including one or more organic layers but at least one light emitting layer in which light is produced;
- (e) a transparent second electrode layer disposed over the organic EL element;
- (f) a reflector layer disposed over the transparent second electrode layer;
- and
- (g) a low index isolation layer having an optical index lower than the light emitting layer disposed between the transparent second electrode layer and the reflector layer.
5 more elements
An enhanced light extraction OLED) device comprising:
- (a) a transparent substrate;
- (b) a transparent first electrode layer disposed over a first surface of the transparent substrate;
- (c) an organic EL element disposed over the first electrode layer and including one or more organic layers but at least one emissive layer in which light is produced;
- (d) a transparent second electrode layer disposed over the organic EL element, and
- (e) a light scattering layer disposed over the transparent second electrode layer.
2 more elements
An enhanced light extraction OLED device comprising:
- (a) a substrate;
- (b) a reflector layer disposed over a first surface of the substrate;
- (c) a light scattering layer;
- (d) a transparent first electrode layer disposed over the light scattering layer;
- (e) an organic EL element disposed over the transparent first electrode layer and including one or more organic layers but at least one emissive layer in which light is produced;
- and
- (f) a transparent second electrode layer disposed over the organic EL element.
4 more elements
An enhanced light extraction OLED device comprising:
- (a) a substrate;
- (b) a reflector layer disposed over a first surface of the substrate;
- (c) a transparent first electrode layer disposed over the reflector layer;
- (d) an organic EL element disposed over the transparent first electrode layer and including one or more organic layers but at least one emissive layer in which light is produced;
- (e) a transparent second electrode layer disposed over the organic EL element;
- and
- (f) a light scattering layer disposed over the transparent second electrode layer;
- and
- (g) a low index isolation layer is disposed between the reflector layer and the organic element.
6 more elements
An enhanced light extraction OLED device comprising:
- (a) a transparent substrate;
- (b) a light scattering layer disposed over a first surface of transparent substrate;
- (c) a transparent first electrode layer disposed over the light scattering layer;
- (d) an organic EL element disposed over the transparent first electrode layer and including one or more organic layers but at least one light emitting layer in which light is produced;
- e) a reflecting second electrode layer disposed over the organic EL element, wherein material for the reflecting second electrode layer is selected from a list including Ag, Ag-based alloys, and Al;
- f) an interlayer disposed between the organic EL element and the reflecting second electrode layer to improve device stability.
3 more elements
An enhanced light extraction OLED device comprising:
- (a) a substrate;
- (b) a reflecting first electrode layer disposed over the substrate, wherein the material for the reflecting first electrode layer is selected from a list including Ag, Ag-based alloys, and Al;
- (c) an organic EL element disposed over the reflecting first electrode layer and including one or more organic layers but at least one light emitting layer in which light is produced;
- (d) a transparent second electrode layer disposed over the organic EL element;
- (e) a light scattering layer disposed over the transparent second electrode layer;
- and
- (f) an interlayer disposed between the organic EL element and the reflecting first electrode layer to improve device stability wherein the interlayer is selected from the group consisting of indium-tin oxide, indium-zinc oxide, zinc-tin oxide, and antimony oxide.
4 more elements
An enhanced light extraction OLED device comprising:
- (a) a transparent substrate;
- (b) a light scattering layer disposed over a first surface of the transparent substrate wherein the light scattering layer comprises light scattering particles dispersed in a matrix and the matrix has an optical index no less than 0.9 times the optical index of the light emitting layer;
- (c) a transparent first electrode layer disposed over the light scattering layer,
- (d) an organic EL element disposed over the transparent first electrode layer and including one or more organic layers but at least one light emitting layer in which light is produced;
- and
- (e) a transparent second electrode layer disposed over the organic EL element.
3 more elements
An enhanced light extraction OLED device comprising:
- (a) a substrate;
- (b) a reflecting first electrode layer disposed over the substrate, wherein the material for the reflecting first electrode layer is selected from a list including Ag, Ag-based alloys, and Al;
- (c) an organic EL element disposed over the reflecting first electrode layer and including one or more organic layers but at least one light emitting layer in which light is produced;
- (d) a transparent second electrode layer disposed over the organic EL element;
- (e) a light scattering layer disposed over the transparent second electrode layer;
- and
- (f) an interlayer disposed between the organic EL element and the reflecting first electrode layer to improve device stability wherein the interlayer is a metal containing phthalocyanine including copper phthalocyanine.
4 more elements
An enhanced light extraction OLED device comprising:
- (a) a substrate;
- (b) a reflector layer disposed over a first surface of the substrate;
- (c) a transparent first electrode layer disposed over the reflector layer;
- (d) an organic EL element disposed over the transparent first electrode layer and including one or more organic layers but at least one emissive layer in which light is produced;
- (e) a transparent second electrode layer disposed over the organic EL element;
- and
- (f) a light scattering layer disposed over the transparent second electrode layer wherein the light scattering layer includes a matrix having dispersed light scattering particles, the matrix having an optical index no less than 0.9 times the optical index of the light emitting layer.
4 more elements
Dependencies are inferred from the claim text.