Author/Authors :
Li، نويسنده , , Jingjing and Sun، نويسنده , , Jiashi and Liu، نويسنده , , Jutao and Li، نويسنده , , Xiangping and Zhang، نويسنده , , Jinsu and Tian، نويسنده , , Yue-li Fu، نويسنده , , Shaobo and Cheng، نويسنده , , Lihong and Zhong، نويسنده , , Haiyang and Xia، نويسنده , , Haiping and Chen، نويسنده , , Baojiu، نويسنده ,
Abstract :
Gd2(WO4)3 phosphors with various Er3+ concentrations and fixed Yb3+ concentration were synthesized via a co-precipitation method, and their crystal structure and morphology were characterized by using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The concentration quenching behaviors of green up- and down-conversion emissions of Er3+ were analyzed, and it was confirmed that the difference between quenching concentration for up- and down-conversion emissions resulted from the different population routes. The temperature sensing properties of the Gd2(WO4)3:Er3+/Yb3+ phosphors were studied, and it was found that the Er3+ doping concentration slightly affected the sensitivity, and Gd2(WO4)3:Er3+/Yb3+ phosphors could be used in a broad temperature region for detecting temperature. Finally, the thermal effect induced by 980 nm LD irradiation was investigated, it was observed that the equilibrium temperature of Gd2(WO4)3:Er3+/Yb3+ sample was decided by both the excitation power and Er3+ doping concentration.
Keywords :
A. Optical materials , B. Chemical synthesis , C. X-ray diffraction , D. Optical properties
