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Proceedings Paper

Quaternary InAIGaN-based multiquantum wells for ultraviolet light-emitting diode application
Author(s): Shiping Guo; Milan Pophristic; Dong S. Lee; Boris Peres; Ian T. Ferguson; Jinhyun Lee; Marek Osinski
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Paper Abstract

High quality InAlGaN alloys, quantum wells and associated light emitting diodes have been grown by metalorganic chemical vapor deposition for ultraviolet (UV) emitters. In-situ reflection and ex-situ atomic force microscopy measurements show that InAlGaN epilayers and structures have good surface morphology. InAlGaN epilayers have also a narrow (0006) reflection X-ray diffraction rocking curve linewidth of ~ 340 arcsec and a strong band edge photoluminescence (PL) emission peak from 320 nm to 355 nm at room temperature. Several X-ray satellite peaks were observed from InAlGaN based quantum well structures, revealing that they were periodic with good interfaces. PL mapping measurements of the quantum well structures show excellent wavelength uniformity over a 2" wafer with a standard deviation of ~ 0.4% for structures emitting from 351-372 nm. Ultraviolet light emitting diodes (UV LEDs) based on the same InAlGaN quantum well structures have an electroluminescence (EL) emission at ~ 375 nm with a linewidth of ~10 nm and an excellent wavelength uniformity of less than 1 nm across a 2" wafer. Temperature dependent study of EL spectrum from an UV LED shows "blue jump" from a broad blue emission at <170 K to a narrow UV emission at higher temperatures.

Paper Details

Date Published: 26 November 2002
PDF: 8 pages
Proc. SPIE 4776, Solid State Lighting II, (26 November 2002); doi: 10.1117/12.457171
Show Author Affiliations
Shiping Guo, EMCORE Corp. (United States)
Milan Pophristic, EMCORE Corp. (United States)
Dong S. Lee, EMCORE Corp. (United States)
Boris Peres, EMCORE Corp. (United States)
Ian T. Ferguson, Georgia Institute of Technology (United States)
Jinhyun Lee, CHTM/Univ. of New Mexico (United States)
Marek Osinski, CHTM/Univ. of New Mexico (United States)

Published in SPIE Proceedings Vol. 4776:
Solid State Lighting II
Ian T. Ferguson; Nadarajah Narendran; Steven P. DenBaars; Yoon-Soo Park, Editor(s)

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