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The Cr‐doping effect on white light emitting properties of Ce: YAG phosphor ceramics
Author(s) -
Tang Yanru,
Zhou Shengming,
Yi Xuezhuan,
Zhang Shuai,
Hao Deming,
Shao Xiuchen
Publication year - 2017
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.14717
Subject(s) - phosphor , materials science , ceramic , luminous efficacy , doping , transparent ceramics , color rendering index , optoelectronics , ion , analytical chemistry (journal) , composite material , chemistry , layer (electronics) , organic chemistry , chromatography
The Cr/Ce‐doped YAG transparent ceramic was fabricated by the solid‐state reaction in vacuum. The Cr/Ce‐doped YAG ceramic phosphor effectively complement the red spectral component and improve the color rendering performance when excited by blue light that is due to the effective energy transfer between Cr 3+ ion and Ce 3+ ion. However, the energy transfer from Ce 3+ to Cr 3+ ion leads to energy loss and therefore the luminous efficacy of the WLED which is composed of blue LED chip and the Cr/Ce‐doped YAG ceramic phosphor decreases. The composite phase structure of ceramic phosphor is designed for improving the extraction efficacy and increasing the luminous efficacy by breaking the total internal reflection (TIR) at the interface between air and ceramic.