Open AccessComposite phase ceramic phosphor of Al_2O_3-Ce:YAG for high efficiency light emitting
Author(s) -
Yanru Tang,
Shengming Zhou,
Chong Chen,
Xuezhuan Yi,
Yue Feng,
Hui Lin,
Zhang Shuai
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.017923
Subject(s) - phosphor , materials science , ceramic , luminous efficacy , composite number , luminous flux , optics , light emitting diode , particle (ecology) , transparent ceramics , optoelectronics , total internal reflection , composite material , layer (electronics) , light source , physics , oceanography , geology
We present our achievement which is a ceramic plate phosphorable to produce white light when directly combined with commercially available blue light emitting diodes. The ceramic phase structure is that the Al₂O₃ particle is uniformly distributed in the Ce:YAG matrix. The Al₂O₃-Ce:YAG ceramic phosphor has a better luminous efficacy than the transparent Ce:YAG ceramic phosphor under the same test condition. The Al₂O₃ particle plays an important role in promoting the luminous efficacy. The Al₂O₃ particle changes the propagation of the light in ceramic, and it reduces the total internal reflection. That is why the composite phase ceramic phosphor improves extraction efficiency of light.