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US 2010/0148146 A1Published application
Monolithic white and full-color light emitting diodes using optically pumped multiple quantum wells
AssigneePalo Alto Research Center Incorporated
InventorsDavid P. Bour, Christopher L. Chua, Noble M. Johnson
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Abstract
An embodiment is a method and apparatus for a white or full-color light-emitting diode. First single or multiple quantum wells (QWs) at a first wavelength are formed at an active region between a p-type layer and an n-type layer of a light-emitting diode. Multiple passive quantum wells (QWs) are formed within the p-type layer or the n-type layer. The multiple passive QWs are optically pumped by the first or single multiple QWs to generate a desired color.
Claims25
A method comprising:
- forming first single or multiple quantum wells (QWs) at a first wavelength at an active region between a p-type layer and an n-type layer of a light-emitting diode;
- and
- forming multiple passive quantum wells (QWs) within the p-type layer or the n-type layer, the multiple passive QWs being optically pumped by the first single or multiple QWs to generate a desired color.
An apparatus comprising:
- first single or multiple quantum wells (QWs) at a first wavelength at an active region between an p-type layer and an n-type layer;
- and
- multiple passive quantum wells (QWs) within the p-type layer or the n-type layer, the multiple passive QWs being optically pumped by the first single or multiple QWs to generate a desired color.
A light-emitting diode (LED) comprising:
- a substrate;
- an n-type layer deposited on the substrate;
- an active region having first single or multiple quantum wells (QWs) at a first wavelength formed on the n-type layer;
- a first p-type layer deposited on the active region;
- a second p-type layer deposited on the first p-type layer;
- and
- multiple passive quantum wells (QWs) formed within the p-type layer or the n-type layer, the multiple passive QWs being optically pumped by the first single or multiple QWs to generate a desired color.
4 more elements
Dependencies are inferred from the claim text.