Highly Efficient Blue-Violet III-Nitride Semipolar Laser Diodes

Tech ID: 23858 / UC Case 2013-490-0

Brief Description

A method for making a high power blue-violet III-nitride semipolar laser diode.

Background

Conventional solid-state lighting systems use a III-nitride light emitting diode (LED) that emits blue light to excite a phosphor that emits yellow light. Although LEDs show promise for solid state lighting applications, they nevertheless suffer from efficiency droop at high injection levels. Laser diodes are a suitable replacement for generating blue light in solid state lighting systems, since they do not experience the same droop effects.

 

Description

Researchers at the University of California, Santa Barbara have developed a method for making a high power blue-violet III-nitride semipolar laser diode. These laser diodes have output powers in excess of 1W, slope efficiencies of more than 1 W/A, external quantum efficiencies (EQEs) in excess of 35%, and show great potential for use in solid state lighting systems.

 

Advantages

  • Precise control of directionality and efficiency of light extraction
  • Higher efficiency at high operating power


Applications

  • Solid state lighting

Patent Status

Country Type Number Dated Case
United States Of America Issued Patent 9,356,431 05/31/2016 2013-490
 

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Other Information

Keywords

indssl, indLED, laser diodes, III-nitride, solid state lighting, cenIEE, indfeat

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