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Proceedings Paper

Short-wavelength III-V LEDs and their applications
Author(s): Toshiya Uemura; Naoki Shibata; Hisao Yamaguchi; Takemasa Yasukawa
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Paper Abstract

III-V nitride semiconductors are suitable for LEDs having color range from blue to green. Luminous intensity and color purity of these LEDs are so high that they have been used for many applications for full color display and LCD backlight and so on. In addition to natural colored LEDs, we have developed short wavelength LED, named TG Purple, which wavelength is typically around 380nm. TG Purple has been realized by controlling Indium composition in GaInN well layers. It can activate photo-catalysts such as TiOx, and therefore, the air purifier for automotive has been developed by combining TG Purple and TiOx photo-catalyst. The short wavelength LED is now the best light source for automotive air purifier using photo-catalyst, because LEDs fulfill the mercury-less requirement for an environmental issue and don't need special circuit like conventional UV lamps such as black light lamps and cold cathode lamps. Furthermore this short wavelength LED is used for phosphor excitation that generates many colors like blue, green, red, etc. It is likely that, with this technology, LEDs will take some part in illumination market as one of primary light sources like incandescent lamps and fluorescent lamps.

Paper Details

Date Published: 3 July 2003
PDF: 10 pages
Proc. SPIE 4996, Light-Emitting Diodes: Research, Manufacturing, and Applications VII, (3 July 2003); doi: 10.1117/12.476560
Show Author Affiliations
Toshiya Uemura, Toyoda Gosei Co., Ltd. (Japan)
Naoki Shibata, Toyoda Gosei Co., Ltd. (Japan)
Hisao Yamaguchi, Toyoda Gosei Co., Ltd. (Japan)
Takemasa Yasukawa, Toyoda Gosei Co., Ltd. (Japan)


Published in SPIE Proceedings Vol. 4996:
Light-Emitting Diodes: Research, Manufacturing, and Applications VII
E. Fred Schubert; H. Walter Yao; Kurt J. Linden; Daniel J. McGraw, Editor(s)

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