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Sr‐induced color‐tunable and thermal stability enhancing in the phosphor (Ba 1‐x Sr x ) 9 Lu 2 Si 6 O 24 :Eu 2+ for solid‐state lighting
Author(s) -
Dong Rujia,
Zou Haifeng,
Zhang Xiangting,
An Zhengce,
Zhou Xiuqing,
Zheng Keyan,
Sheng Ye,
Shi Zhan,
Song Yanhua
Publication year - 2019
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.16388
Subject(s) - phosphor , luminescence , thermal stability , analytical chemistry (journal) , ion , materials science , solid state lighting , light emitting diode , mineralogy , optoelectronics , chemistry , organic chemistry , chromatography
Rare earth ions’ site occupation is significant for studying luminescence properties by changing the host composition. The (Ba 1‐x Sr x ) 9 Lu 2 Si 6 O 24 :Eu 2+ (x = 0‐0.4) tunable‐color phosphors were synthesized via a high temperature solid‐state reaction. With the Sr 2+ ions concentration increase, the luminescent color could be tuned from blue to green. This phenomenon is discussed in detail through the ions occupation in the host lattice. More importantly, the temperature‐dependent luminescence of (Ba 1‐x Sr x ) 9 Lu 2 Si 6 O 24 :Eu 2+ phosphors was investigated and exhibited excellent thermal stability. Furthermore, white LED device has been fabricated using (Ba 1‐x Sr x ) 9 Lu 2 Si 6 O 24 :Eu 2+ phosphor mixed with commercial red phosphor Sr 2 Si 5 N 8 :Eu 3+ combined with a 370 nm UV‐chip. This device showed correlated color temperature (CCT) of 5125 K and high color render index (CRI) of 91. This phosphor will be a promising candidate as a tunable‐color phosphor for UV‐based white LEDs.