Ce~(3+),Sb~(3+)共激活的亚超细磷光体的微波快速合成和发光特性

Rapid Synthesis of CaS:Ce~(3+),Sb~(3+) Phosphor with Submicron-scale by Microwave Radiation Method and Its Luminescence

摘要:

首次采用微波辐射法快速合成了亚超细 Ca S:Ce3+ ,Sb3+高效绿色磷光体 ,发现 Ce3+与 Sb3+离子之间存在着能量传递作用 ,且是属于多极子相互作用的共振传递 ,因而 Ce3+对 Ca S:Sb3+的发光有明显的敏化和增强。微波场作用下合成的双掺磷光体的激发峰与发射峰值分别恒定在 2 5 9nm和 5 2 3nm处 ,并没有像传统高温固相合成法那样 ,随掺杂离子浓度的增大而发生红移现象。SEM照片显示 ,采用含不同一价阳离子 (Na+ ,K+ ,NH+ 4)无机盐作助熔剂制得的亚超细 Ca S:Ce3+ ,Sb3+ 磷光体平均粒径为 30 0 nm～ 5 0 0 nm ,但其晶体形貌分别为立方形、球形和团聚状的雪花形 ,其中球形磷光体荧光最强

Abstract:

CaS:Ce 3+ ,Sb 3+ phosphors with the green color were firstly synthesized by microwave radiation method. The phosphor materials have been characterized by XRD?SEM and the fluorescent spectroscopy. The result shows that the CaS:Ce 3+ , Sb 3+ phosphors possess the cubic structures. The different shapes and submicro scales of the phosphors can be obtained upon doping the different fluxes in the same concentration of Sb 3+ ion in a microwale field. Ce 3+ can sensitize Sb 3+ , and enhance the fluorescent intensity of CaS:Sb 3+ efficiently.