Impact of texture-enhanced transmission on high-efficiency surface-textured light-emitting diodes

Impact of texture-enhanced transmission on high-efficiency surface-textured light-emitting diodes ■

Reiner Windisch, Reiner Windisch, Reiner Windisch, Cathleen Rooman, Cathleen Rooman, Cathleen Rooman, S. Meinlschmidt, S. Meinlschmidt, S. Meinlschmidt, D. Zipperer, D. Zipperer, D. Zipperer, Godfried Dohler, Godfried Dohler, Godfried Dohler, Barun Dutta, Barun Dutta, Barun Dutta, Maarten Kuijk, Maarten Kuijk, Maarten Kuijk, Gustaaf Borghs, Gustaaf Borghs, Gustaaf Borghs, P. Heremans, P. Heremans, P. Heremans

Abstract ■

The transmission properties of semiconductor surfaces can be changed by surface texturing. We investigate these changes experimentally and find that an enhancement of the angle-averaged transmission by a factor of 2 can be achieved with optimum texturing parameters. This enhanced transmission provides an additional light extraction mechanism for high-efficiency surface-textured light-emitting diodes. External quantum efficiencies of 46\% and 54\% are demonstrated before and after encapsulation, respectively. (C) 2001 American Institute of Physics.