光谱学与光谱分析
Upconversion Emission from Er3+ -Yb3+ -Mo6+ Co-Doped ZrO2 -Al2 O3 Composites
XIAO Yu, CONG Yan* , YANG Qi, ZHANG Zhi-hong, LIU Peng-zu
School of Physics & Materials Engineering, Dalian Nationalities University, Dalian 116600, China
Abstract A series of ZrO2 -Al2 O3 composites with various compositions were synthesized by co-precipitation method, and the upconversion emission properties of the Er-Yb-Mo co-doped ZrO2 -Al2 O3 composites were investigated in the present paper. The green UC emission in the Er-Yb-Mo co-doped ZrO2 is an order of magnitude stronger than that of the Er3+ single doped sample. When Al2 O3 mixed in ZrO2 crystalline lattice with the most solid solubility, the crystalline ZrO2 -Al2 O3 solid solutions is tetragonal ZrO2 . The UC emission is enhanced 8 times in the ZrO2 -Al2 O3 solid solutions, which is due to the oxygen vacancies generated in the solid solutions, increasing the energy transfer from Yb3+ -MoO2- 4 to Er3+ .
Key words ：Up conversion;ZrO2 -Al2 O3 solid solutions;Rare earth;Energy transfer
Received: 2013-02-27
Accepted: 2013-05-05
Corresponding Authors:
CONG Yan
E-mail: congyan@dlnu.edu.cn
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