| 光谱学与光谱分析 |
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| Upconversion Emission from Er3+-Yb3+-Mo6+ Co-Doped ZrO2-Al2O3 Composites |
| XIAO Yu, CONG Yan*, YANG Qi, ZHANG Zhi-hong, LIU Peng-zu |
| School of Physics & Materials Engineering, Dalian Nationalities University, Dalian 116600, China |
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Abstract A series of ZrO2-Al2O3 composites with various compositions were synthesized by co-precipitation method, and the upconversion emission properties of the Er-Yb-Mo co-doped ZrO2-Al2O3 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 Al2O3 mixed in ZrO2 crystalline lattice with the most solid solubility, the crystalline ZrO2-Al2O3 solid solutions is tetragonal ZrO2. The UC emission is enhanced 8 times in the ZrO2-Al2O3 solid solutions, which is due to the oxygen vacancies generated in the solid solutions, increasing the energy transfer from Yb3+-MoO2-4 to Er3+.
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Received: 2013-02-27
Accepted: 2013-05-05
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Corresponding Authors:
CONG Yan
E-mail: congyan@dlnu.edu.cn
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