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

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 decre...

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Bibliographic Details
Published in:Journal of the Ceramic Society of Japan 2010, Vol.118(1374), pp.128-131
Main Authors: FUJITA, Shunsuke, UMAYAHARA, Yoshio, TANABE, Setsuhisa
Format: Article
Language:English
Subjects:
Ce:YAG
Glass-ceramic
Light scatterin
Phosphor
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Summary: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.
ISSN:1882-0743
1348-6535
DOI:10.2109/jcersj2.118.128