Devices and methods to improve light outcoupling from an OLED array
First Claim
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1. A device, comprising:
- a substrate;
an organic light emitting diode (OLED) disposed over the substrate;
a first layer optically coupled to the OLED and having a first surface including a first plurality of topographical surface features and an index of refraction n1; and
an enhancement layer optically coupled to the OLED and vertically stacked with the first layer, having a thickness of not more than 100 nm, a second surface including a second plurality of topographical surface features, and an index of refraction n2,wherein n2 has at least a 0.1 difference from an index of refraction of a top layer and a bottom layer adjacent to the enhancement layer.
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Abstract
A device, includes a substrate, an organic light emitting diode (OLED) disposed over the substrate, a first layer optically coupled to the OLED and having a first surface including a first plurality of topographical surface features and an index of refraction n1, and an enhancement layer optically coupled to the OLED and vertically stacked with the first layer, having a thickness of not more than 100 nm, a second surface including a second plurality of topographical surface features, and an index of refraction n2, wherein n2 has at least a 0.1 difference from an index of refraction of at a top layer and a bottom layer adjacent to the enhancement layer.
44 Citations
20 Claims
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1. A device, comprising:
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a substrate; an organic light emitting diode (OLED) disposed over the substrate; a first layer optically coupled to the OLED and having a first surface including a first plurality of topographical surface features and an index of refraction n1; and an enhancement layer optically coupled to the OLED and vertically stacked with the first layer, having a thickness of not more than 100 nm, a second surface including a second plurality of topographical surface features, and an index of refraction n2, wherein n2 has at least a 0.1 difference from an index of refraction of a top layer and a bottom layer adjacent to the enhancement layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of fabricating a device, the method comprising:
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disposing an OLED over a substrate; fabricating a first layer in a stack with the OLED, the first layer being optically coupled to the OLED and having a first surface including a first plurality of topographical surface features and an index of refraction n1; and fabricating an enhancement layer in the stack with the OLED, the enhancement layer being optically coupled to the OLED and having a thickness of not more than 100 nm, a second surface including a second plurality of topographical surface features, and an index of refraction n2, wherein n2 has at least a 0.1 difference from an index of refraction of a top layer and a bottom layer adjacent to the enhancement layer.
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Specification