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Proceedings Paper

High efficiency green LEDs using II-VI color converters
Author(s): Thomas J. Miller; Michael A. Haase; Xiaoguang Sun; Bing Hao; Junying Zhang; Terry L. Smith; Todd Ballen; Junqing Xie; Amy S. Barnes; Fedja Kecman; Joseph Yang; James Thielen; Catherine A. Leatherdale; Ralph Wirth; Andreas Biebersdorf; Karl Engl; Stefan Groetsch
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Paper Abstract

II-VI semiconductors can exhibit strong photoluminescence throughout the visible spectrum and are excellent candidates for filling the so-called "green gap". We report on the performance of green color-converted LEDs fabricated by bonding CdMgZnSe multiple quantum well structures to high-efficiency blue-emitting GaInN LEDs. A device efficacy of 181 lm/W at 537 nm (dominant) is measured under room temperature, 350 mA/mm2 quasi-cw conditions, more than twice as efficient as typical commercial green LEDs today. The thermal roll-off is shown to be comparable to that of typical green GaInN LEDs. Finally, the implications of the availability of high-efficiency, narrow-band, green and yellow emitters in display applications will be discussed.

Paper Details

Date Published: 11 February 2010
PDF: 10 pages
Proc. SPIE 7617, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIV, 76171A (11 February 2010); doi: 10.1117/12.853330
Show Author Affiliations
Thomas J. Miller, 3M Co. (United States)
Michael A. Haase, 3M Co. (United States)
Xiaoguang Sun, 3M Co. (United States)
Bing Hao, 3M Co. (United States)
Junying Zhang, 3M Co. (United States)
Terry L. Smith, 3M Co. (United States)
Todd Ballen, 3M Co. (United States)
Junqing Xie, 3M Co. (United States)
Amy S. Barnes, 3M Co. (United States)
Fedja Kecman, 3M Co. (United States)
Joseph Yang, 3M Co. (United States)
James Thielen, 3M Co. (United States)
Catherine A. Leatherdale, 3M Co. (United States)
Ralph Wirth, OSRAM Opto Semiconductors GmbH (Germany)
Andreas Biebersdorf, OSRAM Opto Semiconductors GmbH (Germany)
Karl Engl, OSRAM Opto Semiconductors GmbH (Germany)
Stefan Groetsch, OSRAM Opto Semiconductors GmbH (Germany)

Published in SPIE Proceedings Vol. 7617:
Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIV
Klaus P. Streubel; Heonsu Jeon; Li-Wei Tu; Norbert Linder, Editor(s)

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