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US 2015/0084005 A1Published application
Leds with improved light extraction
AssigneeGeneral Electric Company
InventorsSrinivas Prasad Sista, Jie Jerry Liu, Xiaolei Shi, Joseph John Shiang, Kevin Henry Janora
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Abstract
A light extraction structure that includes a composition of a base material and a scattering material disposed within the base material. The scattering material is a metal oxide, and the difference between the refractive indices of the base material and the scattering material is at least +/−0.05.
Claims33
A light extraction structure comprising:
- a base material with a first refractive index;
- and
- a scattering material with a second refractive index disposed within the base material, wherein the scattering material is a metal oxide;
- wherein the difference between the first and second refractive indices is at least +/−0.05.
1 more element
A light extraction structure comprising:
- a first layer comprising a base material with a first refractive index and a scattering material with a second refractive index disposed within the base material;
- and
- a planarization layer with a third refractive index disposed directly over the base material.
A light emitting diode (LED) comprising:
- a substrate;
- a light extraction structure disposed directly over the substrate and comprising a first layer comprising a base material and a scattering material, wherein the scattering material comprises a metal oxide;
- a first electrode disposed over the light extraction structure;
- a plurality of layers of semiconductor materials disposed over the first electrode;
- and
- a second electrode disposed over the layers of semiconductor materials, wherein the light extraction structure is configured to reduce the amount of total internal reflection that occurs within the semiconductor materials.
3 more elements
Dependencies are inferred from the claim text.