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Proceedings Paper

Fabrication and characterization of GaN-based blue light-emitting diodes
Author(s): Yuxin Li; Michael G. Brown; Ivan Eliashevich; T. DiCarlo; Chuong A. Tran; Robert F. Karlicek; Richard A. Stall; L. A. Koszi; Yu Cun Lu; Hongen Shen
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Paper Abstract

GaN homojunction and InGaN/GaN single quantum well (SQW) light-emitting diodes (LEDs) were fabricated and characterized. The blue LED has a typical operating voltage of 3.6 V at 20 mS. Temperature dependence of the emission characteristics of the GaN-based LEDs was studied from 25 degrees C to 130 degrees C. The emission intensity of the InGaN/GaN SQW LED decays exponentially with the increase of temperature. The temperature coefficient Lc is 2.5 X 10-2/degrees C. The emission wavelength of the InGaN/GaN SQW LED was found to be relatively independent of the LED operation temperature while the UV emission of the GaN homojunction LED has a red-shift with the increase of temperature. The temperature coefficient (alpha) of the bandgap energy of Si-doped n-type GaN derived from the EL measurement is 8.5 X 10-4/K. The low temperature coefficient of emission wavelength of the InGaN/GaN SQW LED indicates that the recombination processes involves localized states. The localized states are attributed to excitons localized at the potential minima in the quantum well due to In content fluctuation.

Paper Details

Date Published: 7 April 1998
PDF: 6 pages
Proc. SPIE 3279, Light-Emitting Diodes: Research, Manufacturing, and Applications II, (7 April 1998); doi: 10.1117/12.304416
Show Author Affiliations
Yuxin Li, EMCORE Corp. (United States)
Michael G. Brown, EMCORE Corp. (United States)
Ivan Eliashevich, EMCORE Corp. (United States)
T. DiCarlo, EMCORE Corp. (United States)
Chuong A. Tran, EMCORE Corp. (United States)
Robert F. Karlicek, EMCORE Corp. (United States)
Richard A. Stall, EMCORE Corp. (United States)
L. A. Koszi, EMCORE Corp. (United States)
Yu Cun Lu, Rutgers Univ. (United States)
Hongen Shen, U.S. Army Research Lab. (United States)


Published in SPIE Proceedings Vol. 3279:
Light-Emitting Diodes: Research, Manufacturing, and Applications II
E. Fred Schubert, Editor(s)

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