化学沉积法中立方相和六方相CdS薄膜的制备及其特性  

FABRICATION AND PROPERTY OF CUBIC AND HEXAGONAL CdS THIN FILMS BY CHEMICAL BATH DEPOSITION

作　　者：李华维[1] 羊亿[1] 黄岳文[1] 刘敏[1] 罗友良[1] 

机构地区：[1]湖南师范大学物理与信息科学院,长沙410081

出　　处：《太阳能学报》2007年第5期508-512,共5页Acta Energiae Solaris Sinica

基　　金：教育部回国留学启动基金;湖南省教育厅青年项目(031B018)

摘　　要：采用化学沉积法制备了多晶CdS薄膜;利用X射线衍射仪、原子力显微镜、透射光谱以及光电导测试等方法表征了CdS薄膜的晶体结构、光学特性和电学特性.结果表明：通过改变反应液中Cd2＋离子浓度（0.002～0.008mol·L^-1）和提高沉积温度（80～90 ℃）来加快沉积速率,CdS薄膜晶相由六方相（H）向立方相（C）转变,且禁带宽度随Cd2＋离子浓度增大逐渐变大;当Cd2＋离子浓度从0.002mol·L^-1增加到0.005mol·L^-1时,薄膜呈六方相,浓度为0.006mol·L^-1时出现六方与立方两种晶相共存,而浓度为0.008mol·L^-1时薄膜转变为立方相.CdS薄膜表面形貌、光学特性、电学特性也随Cd2＋离子浓度的增大而有规律的变化.The CdS films were fabricated by chemical bath deposition （CBD）. XRD, AFM, UV/Vis etc. were used to characterize the microstructure, optical and electrical property of the CdS films. The results showed that： the CdS film realized the transition from hexagonal phase to cubic phase and the band-gap of CdS increased with the increasing of the cadmium ion concentration and the bath temperature, . The film appeared hexagonal phase（H） When the cadmium ion concentration increased from 0.002M to 0.005M, then it appeared cubic and hexagonal phase coexisted （H ＋ C） at 0. 006M,and showed cubic phase（C） at 0.008M. At the same time, the surface morphology, optical and electrical properties of the CdS films changed regularly.

关 键 词：CDS 六方相 立方相 化学沉积 

分 类 号：O484.42[理学—固体物理]