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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 2 — Jan. 16, 2012
  • pp: 1013–1021

Enhancement of light extraction in GaN-based light-emitting diodes using rough beveled ZnO nanocone arrays

Zhengmao Yin, Xiaoyan Liu, Yongzhong Wu, Xiaopeng Hao, and Xiangang Xu  »View Author Affiliations


Optics Express, Vol. 20, Issue 2, pp. 1013-1021 (2012)
http://dx.doi.org/10.1364/OE.20.001013


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Abstract

A remarkable enhancement of light extraction efficiency in GaN-based blue light-emitting diodes (LEDs) with rough beveled ZnO nanocone arrays grown on the planar indium tin oxide (ITO) layer is reported. The light output power of LEDs with rough beveled ZnO nanocone arrays was increased by about 110% at 20 mA compared with conventional LEDs with planar ITO. The light extraction efficiency of GaN-based LEDs with rough-beveled ZnO nanocones is measured much greater than with smooth-surface hexagonal ZnO nanorods. The light-ray tracing analysis showed that ZnO nanocones with rough surfaces enlarge the light escape cone of GaN-based LEDs and have a greater advantage for extracting light compared with ZnO nanorods.

© 2012 OSA

OCIS Codes
(230.3670) Optical devices : Light-emitting diodes
(220.4241) Optical design and fabrication : Nanostructure fabrication

ToC Category:
Optical Devices

History
Original Manuscript: September 19, 2011
Revised Manuscript: December 9, 2011
Manuscript Accepted: December 13, 2011
Published: January 4, 2012

Citation
Zhengmao Yin, Xiaoyan Liu, Yongzhong Wu, Xiaopeng Hao, and Xiangang Xu, "Enhancement of light extraction in GaN-based light-emitting diodes using rough beveled ZnO nanocone arrays," Opt. Express 20, 1013-1021 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-2-1013


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