期刊
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
卷 30, 期 -, 页码 174-180出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.mssp.2014.10.002
关键词
CdS; Chemical bath deposition; Structured surfaces; pH; Crystal structure
类别
资金
- OSU
- NSF MRI
Chemical bath deposition (CBD) has been used extensively to deposit thin films of CdS for window layers in solar cells. The microtopography or roughness of the surface, however, can affect the quality of the film by influencing the morphology; uniformity, or crystal phase of the COS film. Here, we have demonstrated that thin films of CdS can be successfully patterned on surfaces bearing micropillars as a model surface for roughness. The phase purity of CdS deposited on the micropillar surfaces is uniform and conformal with the formation of packed clusters on the micropillars at pH 10 that form flower-like structures at long deposition times. Smaller crystallites were observed on micropillar arrays at pH 8 with network like structures observed at long deposition times. Additionally, by controlling the pH of the chemical bath, the hexagonal and cubic crystal phases of CdS were both accessible in high purity at temperatures as low as 85 degrees C. (C) 2014 Elsevier Ltd. All rights reserved.
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