title: Synthesis, up-conversion luminescence and thermometry of Yb3+/Er3+co-doped La2.4Mo1.6O8phosphors.
abstract: Yb3+/Er3+co-doped La2.4Mo1.6O8up-conversion phosphors with thermometric properties were synthesized by a conventional solid-state reaction. The optimal synthesis conditions for the pure phase have been determined by varying the types and contents of fluxes. Structural studies verify that all samples retain the same face-centered cubic structure, and the morphology via SEM observation also verified the cubic-like crystal growth behaviour. Yb3+/Er3+co-doped La2.4Mo1.6O8phosphors mainly emit green emission peaks, ascribed to the emission from the excited states2H11/2and4S3/2to the ground state4I15/2of Er3+ion, and the weak red emission from the excited state4F9/2to the ground state4I15/2of Er3+ion when they are excited by 980 nm laser diodes. The up-conversion process has been discussed in detail by pump-power dependence of luminescence intensities and further explained via the energy level diagram. The temperature-dependence properties of La2.4Mo1.6O8phosphors were investigated in detail, which show their potential prospect in temperature-sensing applications.
authors.affiliation: The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing 100083, China. xiazg@ustb.edu.cn.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Yu
authors.affiliation: The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing 100083, China. xiazg@ustb.edu.cn.
authors.forename: Zhiguo
authors.initials: Z
authors.lastname: Xia
authors.affiliation: Department of Mathematics, Huazhong Normal University, Wuhan 430079, China.
authors.forename: Enchun
authors.initials: E
authors.lastname: Liu
authors.affiliation: The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing 100083, China. xiazg@ustb.edu.cn.
authors.forename: Quanlin
authors.initials: Q
authors.lastname: Liu