期刊
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
卷 5, 期 1, 页码 R3049-R3054出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0061601jss
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The powder of glycothermally synthesized, Ce3+-doped yttrium aluminum garnet (YAG:Ce3+) nanoparticles exhibits decreased green-yellow emission, under continuous blue light excitation. This emission corresponds to the 5d -> 4f transition of Ce3+. YAG:Ce3+ nanoparticles were dispersed in polyvinyl pyrrolidone (PVP) and polyvinyl alcohol (PVA) matrix films, to improve their photostabilities. The well-dispersed YAG:Ce3+ nanoparticles were confirmed from transmission electron microscopy observations. The emission and excitation spectra of the composite films were comparable to those of the YAG:Ce3+ nanoparticle powder. The photoluminescence (PL) intensity of the YAG:Ce3+/PVP film gradually decreased to 35% of its initial PL intensity, upon exposure to excitation at 450 nm. The PL intensity of the YAG:Ce3+/PVA film recovered to 95%, after initially decreasing to 82%. The differing photostabilities of the two composite films are discussed. (C) 2015 The Electrochemical Society. All rights reserved.
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