ZnO/CdS复合纳米粒子的热分解合成及发光性能  

Decomption Synthesis and Optical Property of ZnO/CdS Nanoparticles in the Presence of PEG400

作　　者：顾善群[1] 刘劲松[1] 赵传保[1] 李永灿[1] 李子全[1] 

机构地区：[1]南京航空航天大学材料科学与技术学院,江苏南京210016

出　　处：《材料开发与应用》2011年第1期7-10,共4页Development and Application of Materials

基　　金：国家大学生创新性实验计划项目(091028736)资助

摘　　要：设计了简单的化学反应路线,在表面活性剂PEG400存在下通过简单的前驱体热分解反应合成了ZnO/CdS复合纳米粒子,其直径在4-10nm之间。前驱体则通过室温固相反应获得。用X射线衍射仪（XRD）和透射电子显微镜（TEM））对产物的结构和形貌进行了表征。同时,对产物的光致发光性能（PL）作了测试。结果表明：ZnO/CdS复合纳米粒子在380 nm处有一个较弱的归因于近带隙发射的发光峰,550 nm处较强的发射峰来自于由氧空位形成的深浅表面态所捕获的电子-空穴对的复合。另外,对它们的形成机理进行了简单的探讨。In the paper,a simple chemical reaction route has been designed,and ZnO/CdS nanoparticles were successfully synthesized by the simple decomption in the presence of PEG400.The ZnO/CdS nanoparticles are about 4-10 nm in diameter.The product was characterized by X-ray Diffraction（XRD） and Transmission Electron Microscopy（TEM）.The photoluminescence（PL） spectra of the ZnO/CdS nanoparticles exhibit a weak emission peak at 380 nm which is attributed to the near-band-edge exciton emission,and a strong emission peak at 550nm which arises due to the recombination of electron-hole pairs trapped at shallow and deep surface states formed by vacancy of oxygen respectively.The formation mechanism of the ZnO/CdS nanoparticles is also discussed in brief.

关 键 词：ZnO/CdS复合纳米粒子 热分解反应 光致发光性能 

分 类 号：O472.3[理学—半导体物理]