Share Email Print
cover

Proceedings Paper

High power GaN-based LEDs with nano-structured Ga-doped ZnO (GZO) transparent conductive layer (TCL)
Author(s): Weiqing Jia; Bingfeng Fan; Hao Jiang; Yang Liu; Baijun Zhang; Yulun Xian; Shanjing Huang; Zhiyuan Zheng; Zhisheng Wu; Keny Tong; Raymond Wong; Gang Wang
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

High power GaN-based LEDs with nano-structured Ga-doped ZnO (GZO) transparent conductive layer (TCL) were fabricated by using metal-organic chemical vapor deposition (MOCVD) method. Compared with the conventional LED with Ni/Au or ITO process, the saturation current in the LEDs with GZO TCL approximately increased up to more than 14 % and 13 %, and the light output intensity up to 57.5 % and 30.1 %, respectively. This improvement was attributed to the high carrier concentration of GZO TCL and the planar structure at the TCL bottom, which improved the electrical conductivity, and therefore promoted current spreading. The refractive index of GZO is similar to GaN (n ≈ 2) and thereby results in the reduction of the reflection loss between GaN and TCL interface. In addition, the nano-structure of GZO TCL increased the light output critical angle and enhanced surface light emitting while reducing the lateral light loss and consequently improved light extraction efficiency of LEDs.

Paper Details

Date Published: 12 January 2011
PDF: 8 pages
Proc. SPIE 7991, Display, Solid-State Lighting, Photovoltaics, and Optoelectronics in Energy II, 799105 (12 January 2011); doi: 10.1117/12.888412
Show Author Affiliations
Weiqing Jia, Sun Yat-Sen Univ. (China)
Bingfeng Fan, Sun Yat-Sen Univ. (China)
Hao Jiang, Sun Yat-Sen Univ. (China)
Yang Liu, Sun Yat-Sen Univ. (China)
Baijun Zhang, Sun Yat-sen Univ. (China)
Yulun Xian, Sun Yat-Sen Univ. (China)
Shanjing Huang, Sun Yat-Sen Univ. (China)
Zhiyuan Zheng, Sun Yat-Sen Univ. (China)
Zhisheng Wu, Sun Yat-Sen Univ. (China)
Keny Tong, Evercore Optoelectronic Technology Co., Ltd. (China)
Raymond Wong, Evercore Optoelectronic Technology Co., Ltd. (China)
Gang Wang, Sun Yat-Sen Univ. (China)
Evercore Optoelectronic Technology Co., Ltd. (China)


Published in SPIE Proceedings Vol. 7991:
Display, Solid-State Lighting, Photovoltaics, and Optoelectronics in Energy II

© SPIE. Terms of Use
Back to Top