Enhanced light-extraction in GaN light-emitting diode with binary blazed grating reflector

Wenhua Wu; Huaming Wu; Tingwei Wu; Yi Wang; Zhiping Zhou

doi:10.1117/12.821171

19 February 2009 Enhanced light-extraction in GaN light-emitting diode with binary blazed grating reflector

Wenhua Wu, Huaming Wu, Tingwei Wu, Yi Wang, Zhiping Zhou

Proceedings Volume 7279, Photonics and Optoelectronics Meetings (POEM) 2008: Optoelectronic Devices and Integration; 72790O (2009) https://doi.org/10.1117/12.821171
Event: Photonics and Optoelectronics Meetings, 2008, Wuhan, China

Abstract

Enhancement of light extraction in a GaN light-emitting diode (LED) employing a binary blazed grating reflector (BBGR) is presented. The BBGR consists of asymmetrically periodic structure etched on the GaN layer. Rigorous coupled-wave analysis (RCWA) is adopted to calculate the reflectivity of the BBGR, which shows that it has the characteristics of broadband reflection spectrum and very high reflectivity. The result of high angle-averaged reflectivity up to 94% from 300nm to 450nm predicts the potential enhancement of light-extraction efficiency of GaN LEDs with BBGR.

Citation Download Citation

Wenhua Wu, Huaming Wu, Tingwei Wu, Yi Wang, and Zhiping Zhou "Enhanced light-extraction in GaN light-emitting diode with binary blazed grating reflector", Proc. SPIE 7279, Photonics and Optoelectronics Meetings (POEM) 2008: Optoelectronic Devices and Integration, 72790O (19 February 2009); https://doi.org/10.1117/12.821171

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