A novel upconversion luminescent material: Li+ - or Mg2+-codoped Bi3.84W0.16O6.24: TM3+, Yb3+ phosphors and their temperature sensing properties

作者：Sun, Zhen; Liu, Guofeng; Fu, Zuoling^*; Hao, Zhendong; Zhang, Jiahua^*

来源：Dyes and Pigments, 2018, 151: 287-295.

DOI：10.1016/j.dyepig.2018.01.020

• Co-precipitation method
• Saturation effect
• Optical temperature sensing

A novel upconversion (UC) luminescent phosphor Bi3.84W0.16O6.24:Tm3+, Yb3+ was synthesized via co-precipitation method. Distinct visible blue, red, and near-infrared light and weak purple and ultraviolet light UC emissions were all detected under 980 nm excitation in Tm3+-Yb3+-codoped Bi3.84W0.16O6.24 phosphor. Addition of Li+ or Mg2+ ions in Tm3+ -and Yb3+-codoped Bi3.84W0.16O6.24 phosphors further enhanced the blue and red emission intensities. The slope values of the log-log graph of pump power and emission intensity decreased to 1 for the blue emission because of the saturation effect, which was investigated in detail by theoretical and experiment analyses. Optical temperature sensing performances were evaluated in the NIR region from 313 K to 573 K based on the H-3(4(1)) and H-3(4(2)) of Tm3+ ions as thermal coupled energy levels. The corresponding optimum sensitivities were 0.000676, 0.00103, and 0.000696 K-1 at 323 K for free, Li+ ion-, and Mg2+ ion-codoped Bi3.84W0.16O6.24: Tm3+, Yb3+ phosphors, respectively. The introduction of alkali metals (Li) or alkaline earth metals (Mg) also enhanced the temperature sensitivity of the Bi3.84W0.16O6.24:Tm3+, Yb3+ phosphors in the NIR region.

• 出版日期2018-4
• 单位中国科学院; 吉林大学; 中国科学院长春光学精密机械与物理研究所; 发光学及应用国家重点实验室