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://iopscience.iop.org/0957-4484/19/5/055711;js...
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.
|Uncontrolled Keywords:||Condensed matter: electrical, magnetic and optical Semiconductors Nanoscale science and low-D systems Condensed matter: structural, mechanical & thermal|
|Subjects:||Physical Science > Nanophysics|
Physical Science > Nanoelectronics
Physical Science > Quantum phenomena
Engineering > Nanotechnology applications in ICT
|Deposited On:||01 Apr 2010 16:47|
|Last Modified:||01 Apr 2010 16:47|
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