Abstract In this paper, PbF2:Nd3+, Er3+, Yb3+ bidirectional conversion phosphors were successfully prepared by high temperature solid-state method, and characterized by X-ray powder diffraction (XRD), general structure analysis system structure refinement, photoluminescence spectra and lifetime analysis methods. X-ray diffraction and refinement results analyzed phase composition and changes in cell parameters. Intense characteristic emissions of the samples were observed when excited under ultraviolet (378 nm) and different infrared wavelengths (808 nm, 980 nm). Under 808 nm excitation, the PbF2:3mol%Nd3+, 1.5mol%Er3+, 13.5mol% Yb3+ phosphors reached the maximum emission intensity among all samples. In order to study the effect of the Nd3+ ion on the luminescence mechanism, the decay curves of the Er3+: 4S3/2 level at 550 nm under pulsed 808 nm and 980 nm excitation were analyzed. Finally, the down-conversion and up-conversion multi-wavelength sensitive luminescence mechanisms were discussed.

中文翻译：

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PbF2:Nd3+、Er3+、Yb3+磷光体的发光特性及其多波长敏感双向转换机制

摘要 本文采用高温固相法成功制备了 PbF2:Nd3+、Er3+、Yb3+ 双向转换荧光粉，并通过 X 射线粉末衍射 (XRD)、通用结构分析系统结构精修、光致发光光谱和寿命分析进行表征。方法。X 射线衍射和精修结果分析了相组成和电池参数的变化。当在紫外线 (378 nm) 和不同的红外线波长 (808 nm, 980 nm) 下激发时，观察到样品的强烈特征发射。在808 nm激发下，PbF2:3mol%Nd3+、1.5mol%Er3+、13.5mol%Yb3+荧光粉在所有样品中达到最大发射强度。为了研究Nd3+离子对发光机制的影响，Er3+的衰变曲线：分析了在 808 nm 和 980 nm 脉冲激发下 550 nm 处的 4S3/2 水平。最后，讨论了下转换和上转换多波长敏感发光机制。