TY - JOUR
T1 - Preparation, photoluminescence, and photostability of transparent composite films of glycothermally synthesized YAG:Ce3+ nanoparticles for white LED
AU - Sasaki, Yuta
AU - Takeshita, Satoru
AU - Isobe, Tetsuhiko
N1 - Publisher Copyright:
© 2015 The Electrochemical Society.
PY - 2016
Y1 - 2016
N2 - 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.
AB - 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.
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U2 - 10.1149/2.0061601jss
DO - 10.1149/2.0061601jss
M3 - Article
AN - SCOPUS:84945207714
SN - 2162-8769
VL - 5
SP - R3049-R3054
JO - ECS Journal of Solid State Science and Technology
JF - ECS Journal of Solid State Science and Technology
IS - 1
ER -