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A novel upconversion luminescent material: Li+- or Mg2+-codoped Bi3.84W0.16O6.24:Tm3+, Yb3+ phosphors and their temperature sensing properties
Dyes and Pigments ( IF 4.5 ) Pub Date : 2018-01-11 , DOI: 10.1016/j.dyepig.2018.01.020
Zhen Sun , Guofeng Liu , Zuoling Fu , Zhendong Hao , Jiahua Zhang

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 3H4(1) and 3H4(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.



中文翻译:

新型上转换发光材料:Li + -或Mg 2+掺杂的Bi 3.84 W 0.16 O 6.24:Tm 3+,Yb 3+荧光粉及其温度感应特性

通过共沉淀法合成了一种新型的上转换(UC)发光荧光粉Bi 3.84 W 0.16 O 6.24:Tm 3+,Yb 3+。在Tm 3+ –Yb 3+掺杂的Bi 3.84 W 0.16 O 6.24荧光粉中,在980 nm激发下检测到了明显的可见蓝,红,近红外光以及微弱的紫色和紫外UC发射。在Tm 3+和Yb 3+掺杂的Bi中添加Li +或Mg 2+离子Bi 3.84 W 0.16 O 6.24磷光体进一步增强了蓝色和红色发射强度。由于饱和效应,蓝色发射的泵浦功率和发射强度的对数-对数图的斜率值减小到1,这已通过理论和实验分析进行了详细研究。基于Tm 3+离子的3 H 4(1)3 H 4(2)作为热耦合能级,在313 K至573 K的NIR区域中评估了光学温度感测性能。 游离,Li +离子和Mg 2+离子掺杂的Bi 3.84 W 0.16在323 K下的相应最佳灵敏度分别为0.000676、0.00103和0.000696 K -1O 6.24:分别是Tm 3+,Yb 3+荧光粉。碱金属(Li)或碱土金属(Mg)的引入还增强了NIR区域中Bi 3.84 W 0.16 O 6.24: Tm 3+,Yb 3+荧光粉的温度敏感性。

更新日期:2018-01-11
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