Enhancement of Red Persistent Luminescence in Cr

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概要

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• Bi<inf>2</inf>O<inf>3</inf>was proved to be an effective codopant to enhance red persistent luminescence in Cr³⁺-doped ZnGa<inf>2</inf>O<inf>4</inf>spinel. The Cr--Bi-codoped ZnGa<inf>2</inf>O<inf>4</inf>phosphors showed about 10 times higher persistent luminescence intensity than the Cr-singly-doped phosphors. The radiance (in mW sr^-1m^-2) of persistent luminescence in ZnGa<inf>2</inf>O<inf>4</inf>:Cr,Bi phosphors was comparable to that in commercialized SrAl<inf>2</inf>O<inf>4</inf>:Eu,Dy phosphors. Increases of Cr³⁺absorption and photoluminescence were also observed in the Cr--Br-codoped ZnGa<inf>2</inf>O<inf>4</inf>sample. The obtained results suggest that Bi<inf>2</inf>O<inf>3</inf>may play a critical role in stabilizing Cr³⁺in ZnGa<inf>2</inf>O<inf>4</inf>spinel.

• 2013-05-25

著者

• UEDA Jumpei

  Graduate School of Human and Environmental Studies, Kyoto University

• Tanabe Setsuhisa

  Graduate School Of Human And Environmental Studies Kyoto Univ.

• Zhuang Yixi

  Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan

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