Ultraviolet light emitting devices having compressively strained light emitting layer for enhanced light extraction

US9252329B2 · kind B2 · utility

Assignee

• Palo Alto Research Center Incorporated · US

Inventors

• John E. Northrup · Palo Alto, US
• Christopher L. Chua · San Jose, US
• Michael A. Kneissl · Berlin, DE
• Thomas Wunderer · Palo Alto, US
• Noble M. Johnson · Menlo Park, US

Key dates

• Filing date: Dec 16, 2011
• Grant date: Feb 2, 2016
• Expiry date: Jun 14, 2032

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/825

Abstract

Light emitting devices having an enhanced degree of polarization, PD, and methods for fabricating such devices are described. A light emitting device may include a light emitting region that is configured to emit light having a central wavelength, λ, and a degree of polarization, PD, where PD>0.006λ−b for 200 nm≦λ≦400 nm, wherein b≦1.5.