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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.118  No.1374 (February) (2010)  >  pp.128-131

Journal of the Ceramic Society of Japan
<<Previous article Vol.118  No.1374 (February) (2010)   pp.128 - 131 Next article>>

Influence of light scattering on luminous efficacy in Ce:YAG glass-ceramic phosphor

Shunsuke FUJITA1)2), Yoshio UMAYAHARA1) and Setsuhisa TANABE2)
1) Advanced Materials and Technology Division, Nippon Electric Glass
2) Graduate School of Human and Environmental Studies, Kyoto University


  The luminous efficacy of Ce:Y3Al5O12 (YAG) glass-ceramic (GC) phosphor increased with the increasing crystal size of precipitated Ce:YAG, while the light scattering coefficient decreased. This increase in luminous efficacy can be attributed to the decrease in light scattering loss owing to the decrease in light scattering coefficient with increasing Ce:YAG crystal size. According to Mie scattering theory, the reason for the decrease in the light scattering coefficient is the decrease in light scattering cross-section per unit volume with increasing Ce:YAG crystal size.


Keyword:
Ce:YAG, Glass-ceramic, Phosphor, Light scatterin

Received: September 29, 2009
Accepted: November 19, 2009 , Published online: February 01, 2010
Copyright (c) 2010 The Ceramic Society of Japan

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