Cl^-,S^(2-)共掺杂氧化锌荧光粉的制备及发光性能  

Preparation and photoluminescence properties of chloride and sulfur co-doped zinc oxide phosphor

作　　者：李颖毅[1] 宋智彬[2] 罗军明[2] 吴燕利[2] 冯晓平[2] 李永绣[2] 

机构地区：[1]南昌大学材料科学与工程学院,南昌330031 [2]南昌大学稀土与微纳功能材料中心,南昌330031

出　　处：《化工新型材料》2009年第11期81-83,119,共4页New Chemical Materials

基　　金：教育部高校骨干青年教师资助项目(GG-430-10403-1970);南昌大学"211"重点项目

摘　　要：在空气气氛中,以NH4Cl为助剂,通过热氧化硫化锌,制备出Cl-,S2-共掺杂氧化锌荧光粉,激发和发射光谱随氧化温度的变化而变化。在350nm激发下,氧化锌荧光粉的发射光谱只有510nm绿色峰,并有黄色区拖尾现象。绿色峰强度随煅烧温度的变化而变化。绿色峰归因与一价氧空位中的电子和价带中光生空穴的复合。氧化锌荧光粉的光致发光谱的变化是Cl-,S2-共掺杂的结果。Chloride and sulfur co-doped ZnO green phosphor, was prepared by thermal oxidation of zinc sulfide under the assistant of ammonium chloride in air atmosphere. The excitation and emission spectra were observed to vary significantly with oxidation temperature. The photoluminescence spectra of the ZnO phosphors under excitation wavelength at 350 nm showed only one green emission peak at around 510 nm presenting a tail in the yellow region. According to accepter-donor transition mechanisms, this green emission band can be ascribed to a transition of a photogenerated electron from the localized defect centers （donor） to a deeply trapped hole （acceptor） in the bandgap. It was suggested that the trapping rate of hole or electron must be much faster than the radiative recombination rate of the exciton emission, which results in the strong green emission. The study on the PL spectra of the ZnO phosphors revealed that the green luminescence intensity depended on both Zn^＋ sites and Vo^＋ , which were formed on the calcinations process and influenced greatly by the co-doping of Cl,S.

关 键 词：氯化铵 ZNO 荧光粉 C^l- S^2-共掺杂 

分 类 号：O482.31[理学—固体物理]