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Analytical Letters Volume 48, 2015 - Issue 5
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Spectroscopy

Preparation and Upconversion Luminescence Characterization of Eu3+/Yb3+ Codoped 12CaO · 7Al2O3 Ceramics

Ye TaoDepartment of Chemistry, Harbin Institute of Technology, Harbin, P. R. China
,
Yongqiang ZhaoDepartment of Mechanical Design, Harbin Institute of Technology, Harbin, P. R. China
,
Rui WangDepartment of Chemistry, Harbin Institute of Technology, Harbin, P. R. ChinaCorrespondence[email protected] [email protected]
,
Yunfei QuDepartment of Chemistry, Harbin Institute of Technology, Harbin, P. R. China
,
Yanping LiaoDepartment of Chemistry, Harbin Institute of Technology, Harbin, P. R. China
&
Yanling XuDepartment of Chemistry, Harbin Institute of Technology, Harbin, P. R. ChinaCorrespondence[email protected] [email protected]
Pages 809-816 | Received 26 May 2014, Accepted 25 Aug 2014, Published online: 31 Dec 2014
 
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Abstract

Eu3+/Yb3+ codoped 12CaO · 7Al2O3 (C12A7) ceramics were prepared via high temperature solid-state reaction method, and characterized by X-Ray powder diffraction. Under the excitation of 980 nm laser radiation, efficient upconversion emissions were observed in 450–900 nm region and attributed to the 5DJ→7FJ transitions of Eu3+ ions. The proposed upconversion emission mechanism involves the two-photon cooperative upconversion process. The effects of Yb3+ ions on the upconversion emission follow a concentration-dependent manner. The Commission Internationale de I'eclairage (CIE) chromaticity coordinates (x, y) illustrate the color of emissions can be tunable to purer green by increasing the Yb3+ concentration.

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