When YVO4:Eu3+ nanophosphors synthesized by a low-temperature wet chemical process in the presence of citrate ions are continuously excited by UV light, the photoluminescence (PL) intensity gradually decreases. This photobleaching is accompanied with the reduction of V 5+ to V4+, as confirmed by electron paramagnetic resonance spectroscopy. Hydrothermal treatment of YVO4:Eu3+ nanophosphors in the presence of PO43- ions produces Y(V, P)O 4:Eu3+ through the partial replacement berween VO4 3- and PO43-, and hence results in the increase in the PL intensity and the suppression of photobleaching.
|ホスト出版物のタイトル||ECS Transactions - Physics and Chemistry of Luminescent Materials, Including the 4th Symposium on Persistent Phosphors|
|出版ステータス||Published - 2009 11月 25|
|イベント||Physics and Chemistry of Luminescent Materials, Including the 4th Symposium on Persistent Phosphors - 214th ECS Meeting - Honolulu, HI, United States|
継続期間: 2008 10月 12 → 2008 10月 17
|Other||Physics and Chemistry of Luminescent Materials, Including the 4th Symposium on Persistent Phosphors - 214th ECS Meeting|
|Period||08/10/12 → 08/10/17|
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