CdS/ZnO复合颗粒的制备与电致发光性能  

Preparation and electroluminescence of ZnO/CdS composite particles

作　　者：王玲玲[1] 陈小琴[1] 赵晓鹏[1] 

机构地区：[1]西北工业大学电流变技术研究所,陕西西安710129

出　　处：《功能材料》2009年第8期1305-1308,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(60778042);国家杰出青年科学基金资助项目(50025207);西北工业大学基础研究基金资助项目(WO18101)

摘　　要：以sol-gel法制备了ZnO前驱体,并通过水热反应得到了CdS/ZnO复合颗粒。采用红外光谱(IR)、X射线衍射(XRD)、扫描电镜(SEM)表征其结构、组成及形貌,并对其电致发光(EL)特性进行表征。结果表明CdS纳米晶生长在ZnO基体上;EL谱表明没有煅烧的CdS/ZnO复合颗粒表现为CdS的激子发射,发光强度较纯CdS有了明显的提高;而煅烧后的CdS/ZnO复合颗粒则表现为ZnO的缺陷发射,发光谱的半高宽较纯ZnO有所减小。ZnO precursor was prepared by a sol-gel technique and the CdS/ZnO composite particles was obtained by hydrothermal reaction. The nanocrystals were characterized by infrared spectrum （IR）, X-ray diffraction （XRD） and scanning electron microscope （SEM）, which were used to characterized their structure, composition and morphology. The optical properties were investigated by electroluminescence spectra. It is found that CdS nanoparticles were grown on the surface of ZnO. EL spectra indicate that CdS/ZnO composite particles without calcining presents the exciton emission of CdS and the intensity of EL increases obviously. While the CdS/ZnO composite particles after calcining presents the defect emission of ZnO as well as the full width at half maximum （FWHM） becomes narrow.

关 键 词：CDS ZNO 复合颗粒 电致发光 

分 类 号：O472.3[理学—半导体物理]