Size dependence of the luminescence spectra and dynamics of EU3+: Y2O3 nanocrystals

被引：148

作者：

Williams, DK ^{[1
]}

Yuan, H ^{[1
]}

Tissue, BM ^{[1
]}

机构：

[1] Virginia Polytech Inst & State Univ, Dept Chem, Blacksburg, VA 24061 USA

来源：

JOURNAL OF LUMINESCENCE | 1999年 / 83-4卷

基金：

美国国家科学基金会;

关键词：

EU3+: Y2O3; nanocrystals; lifetimes;

D O I：

10.1016/S0022-2313(99)00114-3

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report the optical spectra and lifetimes of nanocrystalline Eu3+ : Y2O3 as a function Of particle diameter from 15 to 7 nm. As the particle size decreases, the spectra show increased line broadening and the emergence of a disordered phase. The 7-nm sample also contains cubic-phase material in addition to the monoclinic phase that is usually produced by the gas-phase-condensation synthesis. The D-5(0) lifetimes increase by more than a factor of two when the particle size decreases from approximately 15-7 nm, with the decay transients becoming non-single exponential For the 13-nm and smaller particles. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：297 / 300

页数：4

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