High luminescence quantum efficiency of Eu3+-doped SnO2-SiO2 glasses due to excitation energy transfer from nano-sized SnO2 crystals

被引：0

作者：

Hayakawa, T ^{[1
]}

Nogami, M ^{[1
]}

机构：

[1] Nagoya Inst Technol, Dept Mat Sci & Engn, Showa Ku, Nagoya, Aichi 4668555, Japan

来源：

SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS | 2005年 / 6卷 / 01期

关键词：

Eu3+; SnO2; nanocrystals; energy transfer; quantum size effect; sol-gel method;

D O I：

10.1016/j.stam.2004.07.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The strong Eu3+ photoluminescence in xSnO(2)-(100-x)SiO2 derived by the sol-gel method was reported. It was shown that Eu3+ ions were embedded in SnO2 nanocrystals (tetragonal, rutile) surrounded by a SiO2 glass matrix. Time-resolved photoluminescence spectra and excitation spectra revealed that Eu3+ ions could receive excitation energy from electron-hole pairs in SnO2 semiconductor nanocrystal, whose band-gap energy shifted to the higher energy side due to the quantum size effect, and was tuned to an optimum frequency for energy transfer to Eu3+ ions. Absolute quantum luminescence efficiencies were found to be 60.5 (internal) and 26.7% (external). (c) 2004 Published by Elsevier Ltd.

引用

页码：66 / 70

页数：5

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