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Broadband spectrally dynamic solid state illumination source

Journal Article:

Abstract

Solid state lighting has done well recently in niche markets such as signage and displays, however, no available SSL technologies incorporate all the necessary attributes for general illumination. Development of a novel solid state general illumination source is discussed here. Two LEDs emitting at two distinct wavelengths can be monolithically grown and used to excite two or more phosphors with varied excitation spectra. The combined phosphorescence spectrum can then be controlled by adjusting the relative intensities of the two LED emissions. Preliminary phosphor analysis shows such a scheme to be viable for use in a spectrally dynamic broadband general illumination source. A tunnel junction is envisioned as a means of current spreading in a buried layer for three terminal operation. However, tunnel junction properties in GaN based materials are not well understood, and require further optimization to be practical devices. Preliminary results on GaN tunnel junctions are presented here as well. (copyright 2006 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)
Authors:
Nicol, David B; Asghar, Ali; Gupta, Shalini; Kang, Hun; Pan, Ming; [1]  Strassburg, Martin; [1]  Georgia State University, Department of Physics and Astronomy, Atlanta, GA 30302-4106 (United States)]; Summers, Chris; Ferguson, Ian T [2] 
  1. Georgia Institute of Technology, School of Electrical and Computer Engineering, Atlanta, GA 30332-0250 (United States)
  2. Georgia Institute of Technology, School of Materials Science and Engineering, Atlanta, GA 30332 (United States)
Publication Date:
Jun 15, 2006
Product Type:
Journal Article
Resource Relation:
Journal Name: Physica Status Solidi C; Journal Volume: 3; Journal Issue: 6; Conference: ICNS-6: 6. international conference on nitride semiconductors, Bremen (Germany), 28 Aug - 2 Sep 2005; Other Information: With 2 figs., 2 tabs., 4 refs.. SICI: 1610-1634(200606)3:6<2223::AID-PSSC200565435>3.0.TX;2-B
Subject:
30 DIRECT ENERGY CONVERSION; PHOTOLUMINESCENCE; LAYERS; LIGHT EMITTING DIODES; INORGANIC PHOSPHORS; JUNCTION DIODES; SEMICONDUCTOR JUNCTIONS; TUNNEL EFFECT; GALLIUM NITRIDES; OPTIMIZATION; TUNNEL DIODES; ELECTRIC CONDUCTIVITY; DOPED MATERIALS; P-TYPE CONDUCTORS; EMISSION SPECTRA; VISIBLE SPECTRA; SPECTRAL RESPONSE; STRONTIUM SULFIDES; GALLIUM SULFIDES; INTERMETALLIC COMPOUNDS; CALCIUM COMPOUNDS; LIGHT SOURCES
OSTI ID:
20762925
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 1610-1634; TRN: DE06G7659
Availability:
Available from: http://dx.doi.org/10.1002/pssc.200565435
Submitting Site:
DE
Size:
page(s) 2223-2226
Announcement Date:
Aug 19, 2006

Journal Article:

Citation Formats

Nicol, David B, Asghar, Ali, Gupta, Shalini, Kang, Hun, Pan, Ming, Strassburg, Martin, Georgia State University, Department of Physics and Astronomy, Atlanta, GA 30302-4106 (United States)], Summers, Chris, and Ferguson, Ian T. Broadband spectrally dynamic solid state illumination source. Germany: N. p., 2006. Web. doi:10.1002/pssc.200565435.
Nicol, David B, Asghar, Ali, Gupta, Shalini, Kang, Hun, Pan, Ming, Strassburg, Martin, Georgia State University, Department of Physics and Astronomy, Atlanta, GA 30302-4106 (United States)], Summers, Chris, & Ferguson, Ian T. Broadband spectrally dynamic solid state illumination source. Germany. doi:10.1002/pssc.200565435.
Nicol, David B, Asghar, Ali, Gupta, Shalini, Kang, Hun, Pan, Ming, Strassburg, Martin, Georgia State University, Department of Physics and Astronomy, Atlanta, GA 30302-4106 (United States)], Summers, Chris, and Ferguson, Ian T. 2006. "Broadband spectrally dynamic solid state illumination source." Germany. doi:10.1002/pssc.200565435. https://www.osti.gov/servlets/purl/10.1002/pssc.200565435.
@misc{etde_20762925,
title = {Broadband spectrally dynamic solid state illumination source}
author = {Nicol, David B, Asghar, Ali, Gupta, Shalini, Kang, Hun, Pan, Ming, Strassburg, Martin, Georgia State University, Department of Physics and Astronomy, Atlanta, GA 30302-4106 (United States)], Summers, Chris, and Ferguson, Ian T}
abstractNote = {Solid state lighting has done well recently in niche markets such as signage and displays, however, no available SSL technologies incorporate all the necessary attributes for general illumination. Development of a novel solid state general illumination source is discussed here. Two LEDs emitting at two distinct wavelengths can be monolithically grown and used to excite two or more phosphors with varied excitation spectra. The combined phosphorescence spectrum can then be controlled by adjusting the relative intensities of the two LED emissions. Preliminary phosphor analysis shows such a scheme to be viable for use in a spectrally dynamic broadband general illumination source. A tunnel junction is envisioned as a means of current spreading in a buried layer for three terminal operation. However, tunnel junction properties in GaN based materials are not well understood, and require further optimization to be practical devices. Preliminary results on GaN tunnel junctions are presented here as well. (copyright 2006 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)}
doi = {10.1002/pssc.200565435}
journal = {Physica Status Solidi C}
issue = {6}
volume = {3}
place = {Germany}
year = {2006}
month = {Jun}
}