%A XIAO Yu;CONG Yan*;YANG Qi;ZHANG Zhi-hong;LIU Peng-zu %T Upconversion Emission from Er3+-Yb3+-Mo6+ Co-Doped ZrO2-Al2O3 Composites %0 Journal Article %D 2013 %J SPECTROSCOPY AND SPECTRAL ANALYSIS %R 10.3964/j.issn.1000-0593(2013)11-2913-04 %P 2913-2916 %V 33 %N 11 %U {https://www.gpxygpfx.com/CN/abstract/article_6647.shtml} %8 2013-11-01 %X 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+.