Polyol synthesis of YVO4:Bi3+,Eu3+ nanophosphors and effect of silica coating on their photoluminescence properties

Hiroki Hara, Satoru Takeshita, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji Niikura

研究成果: Article査読

5 被引用数 (Scopus)

抄録

YVO4:Bi3+,Eu3+ nanophosphor is prepared from sodium orthovanadate and nitrates of yttrium, bismuth, and europium in a polyol solvent of diethylene glycol at 160°C. The photoluminescence (PL) intensity of the nanophosphor is enhanced by a factor of 3.3 after silica coating via reverse micelle method. The gradual increase in the PL intensity is observed under the continuous excitation irrespective of silica coating. This increase in the PL intensity is attributed to the photooxidation of V4+ to V5+, as confirmed by electron spin resonance spectroscopy. Finally, a highly luminescent and photostable nanophosphor can be prepared by combination of photooxidation pre-treatment and silica coating.

本文言語English
ページ(範囲)s18-s21
ジャーナルJournal of Ceramic Processing Research
14
SUPPL.1
出版ステータスPublished - 2013 7 1

ASJC Scopus subject areas

  • Ceramics and Composites

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