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

被引：3
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.
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页码：66 / 70
页数：5
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