| 光谱学与光谱分析 |
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| Study on the Property of CBD-CdS Thin Films |
| SUN Xue-bai, ZHANG Xi-qing, DU Peng，CHANG Xiao-wei, WANG Jun-ling, HUANG Shi-hua |
| Institute of Optoelectronics Technology, Laboratory of Materials for Information Storage and Display, Beijing Jiaotong University, Beijing 100044, China |
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Abstract CdS thin films were prepared by chemical bath deposition (CBD) at 90 ℃. The influence of annealing and CdCl2 treatment on CBD-CdS thin film was studied. XRD and SEM were used to study the crystal structure and surface morphology of the films. The untreated CBD-CdS films had poor crystallinity; the CdS thin film made with annealing treatment had cubic crystallinity but small grain size. After the CdCl2 treatment, these films recrystallized to the hexagonal phase, resulting in a better crystallinity, and smooth surface morphology. Optical properties were studied by absorption spectrum. The energy gap of the films was found to decrease by annealing, and the CBD-CdS made with CdCl2 treatment had a lower density of planar defects. In conclusion, the CdCl2 treatment can improve the properties of the CdS thin films.
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Received: 2005-10-30
Accepted: 2006-02-10
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Corresponding Authors:
SUN Xue-bai
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