晶体结构对(Zn,Cd)S:Cu电致发光材料发光性能的影响

采用X射线衍射法定量测定了不同Cd2+含量下,(Zn,Cd)S:Cu,Cl电致发光粉的晶体结构成分.发现随着Cd2+的增加,材料中立方结构的含量逐渐减少,发光光谱向长波方向移动,而且亮度逐渐降低.利用相变使材料结构由六角结构向立方结构转变,大幅度提高了材料的发光亮度.

Effect of Crystal Structure on the Photoluminescence Property of ZnS:Cu Electroluminescent Material

Different crystal structure ingredient of (Zn,Cd)S,Cl electroluminescent powder was measured by means of x-ray diffraction method at different Cd~2+ concentration ,and the influence of crystal structure on it' brightness was studied. The result shows that with the increase of Cd~2+,the content of cubic phase would be reduced ,electroluminescence spectrum moved to long-wavelength and brightness decreased gradually .To increase the content of cubic phase and advance the brightness ,the material was calcined in 1 200 °C ,and then be milled. With exterior pressure ,the β phase was changed to α phase ,and material brightness increased quickly. The Electroluminescent material maked by this method not only have a high brightness but also have a good waterproof property.