Research on the Polycrystalline CdS Thin Films Prepared by Close-Spaced Sublimation
YANG Ding-yu1,2,XIA Geng-pei1*,ZHENG Jia-gui1,FENG Liang-huan1,CAI Ya-ping1
1. School of Material Science and Engineering, Sichuan University, Chengdu 610064, China 2. Department of Optoelectronic Technology, Chengdu University of Information Technology, Chengdu 610225, China
Abstract：In the present paper, the factors of influence on the deposition rate of CdS films prepared by close-spaced sublimation (CSS) were first studied systematically, and it was found from the experiments that the deposition rate increased with the raised temperature of sublimation source, while decreased with the raised substrate temperature and the deposition pressure. The structure, morphology and light transmittance of the prepared samples were tested subsequently, and the results show: (1) The CdS films deposited under different oxygen partial pressure all present predominating growth lattice orientation (103), and further more the films will be strengthened after annealed under CdCl2 atmosphere. (2) The AFM images of CdS show that the films are compact and uniform in grain diameter, and the grain size becomes larger with the increased substrate temperature. Along with it, the film roughness was also augmented. (3) The transmittance in the shortwave region of visible light through the CdS films would be enhanced when its thickness is reduced, and that will help improve the shortwave spectral response of CdTe solar cells. Finally, the prepared CdS films were employed to fabricate CdTe solar cells, which have achieved a conversion efficiency of 10.29%, and thus the feasibility of CSS process in the manufacture of CdTe solar cells was validated primarily.
Key words：CdTe solar cells;Close-spaced sublimation;Polycrystalline CdS thin films
杨定宇1, 2,夏庚培1*,郑家贵1,冯良桓1,蔡亚平1 . 近空间升华法制备CdS多晶薄膜的研究[J]. 光谱学与光谱分析, 2009, 29(01): 56-61.
YANG Ding-yu1,2,XIA Geng-pei1*,ZHENG Jia-gui1,FENG Liang-huan1,CAI Ya-ping1. Research on the Polycrystalline CdS Thin Films Prepared by Close-Spaced Sublimation. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(01): 56-61.
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