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Integrated Ferroelectrics
An International Journal
Volume 142, 2013 - Issue 1
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Original Articles

Upconversion Luminescence of Tm3+/Yb3+ Codoped Oxyfluoride Glass Ceramics Containing Ba2YbF7 Nanocrystals

Gongxun Bai Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Hong Kong, P.R. China
,
Lili Tao Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Hong Kong, P.R. China
,
Yonggang Wang Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Hong Kong, P.R. China
&
Yuen Hong Tsang Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Hong Kong, P.R. China
Pages 31-36 | Received 30 Jun 2012, Accepted 23 Oct 2012, Published online: 30 May 2013
 
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Abstract

Tm3+/Yb3+ codoped transparent oxyfluoride borosilicate glass ceramics containing fluoride nanocrystals Ba2YbF7 was fabricated and the upconversion luminescence of this novel glass ceramics was investigated under 975 nm excitation. The successful formation of fluoride nanocrystals Ba2YbF7 in glass matrix was confirmed by the results of X-ray diffraction (XRD) and transmission electron microscopy (TEM). Compared with the precursor glass, great enhancement of upconversion luminescence was measured in the Tm3+/Yb3+ codoped transparent glass ceramics, which was due to the lower phonon energy obtained in the formed nanocrystals, the scattering by the nanocrystals and efficient Yb3+-Tm3+ inter-ionic interactions. Therefore, the material studied in this report can find potential application in upconversion light material.

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