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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 17 — Aug. 26, 2013
  • pp: 19668–19674

P-side up AlGaInP-based light emitting diodes with dot-patterned GaAs contact layers

Ray-Hua Horng, Bing-Rui Wu, Chi-Feng Weng, Parvaneh Ravadgar, Tzong-Ming Wu, Sing-Ping Wang, Jr-Hau He, Tsung-Hsien Yang, Yi-Ming Chen, Tzu-Chieh Hsu, Ai-Sen Liu, and Dong-Sing Wuu  »View Author Affiliations


Optics Express, Vol. 21, Issue 17, pp. 19668-19674 (2013)
http://dx.doi.org/10.1364/OE.21.019668


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Abstract

High-brightness p-side up AlGaInP-based red light emitting diodes (LEDs) with dot-patterned GaAs contact layer and surface rough structure are presented in this article. Initial LED structure of p-GaP/AlGaInP/GaAs is epitaxially grown using metal organic chemical vapor deposition technique. Using novel twice transferring process, the p-GaP layer is remained at the top side as both the current spreading and-window layer. Dot patterned GaAs contact dots are formed between main structure and rear mirror to improve light reflection and current spreading. Moreover, the surface of p-GaP window is further textured by nano-sphere lithography technique for improving the light extraction. Significant improvement in output power is found for AlGaInP LEDs with GaAs contact dots and roughened p-GaP window as compared with those of LEDs with traditional n-side up and p-side up structures without roughened surfaces.

© 2013 OSA

OCIS Codes
(230.0230) Optical devices : Optical devices
(230.3670) Optical devices : Light-emitting diodes

ToC Category:
Optical Devices

History
Original Manuscript: May 8, 2013
Revised Manuscript: July 14, 2013
Manuscript Accepted: July 30, 2013
Published: August 14, 2013

Citation
Ray-Hua Horng, Bing-Rui Wu, Chi-Feng Weng, Parvaneh Ravadgar, Tzong-Ming Wu, Sing-Ping Wang, Jr-Hau He, Tsung-Hsien Yang, Yi-Ming Chen, Tzu-Chieh Hsu, Ai-Sen Liu, and Dong-Sing Wuu, "P-side up AlGaInP-based light emitting diodes with dot-patterned GaAs contact layers," Opt. Express 21, 19668-19674 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-17-19668


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