title: [Upconversion emission from Er(3+)-Yb(3+)-Mo6+ co-doped ZrO2-Al2 O3 composites].
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 Yb(3+)-MoO4(2-) to Er3+.
authors.affiliation: School of Physics & Materials Engineering, Dalian Nationalities University, Dalian 116600, China. xiaoyu19890702@163.com
authors.forename: Yu
authors.initials: Y
authors.lastname: Xiao
authors.affiliation: School of Physics & Materials Engineering, Dalian Nationalities University, Dalian 116600, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Cong
authors.affiliation: School of Physics & Materials Engineering, Dalian Nationalities University, Dalian 116600, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Yang
authors.affiliation: School of Physics & Materials Engineering, Dalian Nationalities University, Dalian 116600, China.
authors.forename: Zhi-Hong
authors.initials: ZH
authors.lastname: Zhang
authors.affiliation: School of Physics & Materials Engineering, Dalian Nationalities University, Dalian 116600, China.
authors.forename: Peng-Zu
authors.initials: PZ
authors.lastname: Liu