Highly Efficient Blue-Violet III-Nitride Semipolar Laser Diodes
Tech ID: 23858 / UC Case 2013-490-0
A method for making a high power blue-violet III-nitride semipolar laser diode.
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.
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.
- Precise control of directionality and efficiency of light extraction
- Higher efficiency at high operating power
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