Increase in the extraction efficiency of GaN-based light-emitting diodes via surface roughening
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- 9 February 2004
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 84 (6) , 855-857
- https://doi.org/10.1063/1.1645992
Abstract
Roughened surfaces of light-emitting diodes (LEDs) provide substantial improvement in light extraction efficiency. By using the laser-lift-off technique followed by an anisotropic etching process to roughen the surface, an n-side-up GaN-based LED with a hexagonal “conelike” surface has been fabricated. The enhancement of the LED output power depends on the surface conditions. The output power of an optimally roughened surface LED shows a twofold to threefold increase compared to that of an LED before surface roughening.Keywords
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