Dependence of photoluminescence (PL) emission intensity on Eu~(3+) and ZnOconcentrations in Y_2O_3:Eu~(3+) and ZnOY_2O_3:Eu3+ nanophosphors

G.H. Mhlongo; M.S. Dhlamini; H.C. Swart; O.M. Ntwaeaborwa; K.T. Hillie

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Dependence of photoluminescence (PL) emission intensity on Eu~(3+) and ZnOconcentrations in Y_2O_3:Eu~(3+) and ZnOY_2O_3:Eu3+ nanophosphors

机译：Y_2O_3：Eu〜（3+）和ZnOY_2O_3：Eu3 +纳米磷光体中发光（PL）发射强度对Eu〜（3+）和ZnO浓度的依赖性

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摘要

Y_2O_3:Eu~(3+) and ZnOY_2O_3:Eu~(3+) nanophosphor powders with different concentrations of Eu~(3+) ions were synthesized by a sol-gel method and their luminescence properties were investigated. The red photoluminescence (PL) from Eu~(3+) ions with the main emission peak at 612 nm was observed to increase with Eu~(3+) concentration from 0.25 to 0.75 mol% and decreased notably when the concentration was increased to 1 mol%. The decrease in the PL intensity at higher Eu~(3+) concentrations can be associated with concentration quenching effects. The red emission at 612 nm was shown to increase considerable when ZnO nanoparticles were incorporated in Y_2O_3:Eu~(3+) while green emission from ZnO was suppressed. The increase is attributed to energy transfer from ZnO to Eu~(3+).

机译：采用溶胶-凝胶法合成了不同浓度的Eu〜（3+）离子的Y_2O_3：Eu〜（3+）和ZnOY_2O_3：Eu〜（3+）纳米粉，并研究了它们的发光性能。观察到主要发射峰在612nm处的Eu〜（3+）离子的红色光致发光（PL）随着Eu〜（3+）浓度从0.25到0.75 mol％的增加而增加，当浓度增加到1时显着减少摩尔％。 Eu〜（3+）浓度越高，PL强度的降低可能与浓度猝灭效应有关。当在Y_2O_3：Eu〜（3+）中掺入ZnO纳米颗粒时，在612 nm处的红色发射显着增加，同时抑制了ZnO的绿色发射。这种增加归因于从ZnO到Eu〜（3+）的能量转移。

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来源
《Optical Materials》 |2011年第10期|p.1495-1499|共5页
作者
G.H. Mhlongo; M.S. Dhlamini; H.C. Swart; O.M. Ntwaeaborwa; K.T. Hillie;
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作者单位

National Centre for Nano-structured Materials. Council for Scientific and Industrial Research. I-Meiring Naude Road Brummeria TO Box 395 Pretoria 0001 South Africa Department of Physics University of Free State Bloemfontein ZA9300 South Africa;

National Centre for Nano-structured Materials. Council for Scientific and Industrial Research. I-Meiring Naude Road Brummeria TO Box 395 Pretoria 0001 South Africa Department of Physics University of South Africa Pretoria South Africa;

Department of Physics University of Free State Bloemfontein ZA9300 South Africa;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
energy transfer; phosphors; concentration quenching effect;

机译：能量转移;荧光粉浓度猝灭作用;

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Dependence of photoluminescence (PL) emission intensity on Eu~(3+) and ZnOconcentrations in Y_2O_3:Eu~(3+) and ZnOY_2O_3:Eu3+ nanophosphors

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