Nano Archive

Enhanced emissions of Eu3+ by energy transfer from ZnO quantum dots embedded in SiO2 glass

Yu, Yunlong and Wang, Yuansheng and Chen, Daqin and Huang, Ping and Ma, En and Bao, Feng (2008) Enhanced emissions of Eu3+ by energy transfer from ZnO quantum dots embedded in SiO2 glass. NANOTECHNOLOGY, 19 (5).

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Official URL: http://www.iop.org/EJ/abstract/-search=66090887.1/...

Abstract

SiO2:Eu3+ based bulk composites containing ZnO quantum dots were synthesized by an in situ sol-gel process. The quantum dots homogeneously distributed among the SiO2 glass matrix exhibited a broad ultraviolet emission band centered at 385 nm. The ZnO ultraviolet luminescence intensity decreased monotonically with increasing Eu3+ doping concentration, while the Eu3+ visible emission was intensified significantly by the precipitation of ZnO quantum dots, ascribed to the energy transfer from ZnO to Eu3+. The Eu3+ luminescence at 612 nm for the sample with 20 mol% ZnO was about ten times stronger than that for the sample without ZnO. The influence of ZnO or Eu3+ concentration on the energy transfer process is discussed.

Item Type:Article
Uncontrolled Keywords:ZNO-SIO2 NANOCOMPOSITES; LUMINESCENCE PROPERTIES; PHOTOLUMINESCENCE; NANOCRYSTALS; IONS; MATRIX; ER3+
Subjects:Material Science > Functional and hybrid materials
Material Science > Nanochemistry
ID Code:6433
Deposited By:IoN
Deposited On:24 Sep 2009 11:56
Last Modified:24 Sep 2009 11:56

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