Preparation, photoluminescence, and photostability of transparent composite films of glycothermally synthesized YAG: Ce3+ nanoparticles for white LED

Yuta Sasaki, Satoru Takeshita, Tetsuhiko Isobe

研究成果: Article査読

9 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)R3049-R3054
ジャーナルECS Journal of Solid State Science and Technology
5
1
DOI
出版ステータスPublished - 2016

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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