期刊
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
卷 32, 期 6, 页码 -出版社
A V S AMER INST PHYSICS
DOI: 10.1116/1.4896334
关键词
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资金
- Estonian Centre of Excellence in Research Project [TK117T]
- Estonian Energy Technology Program [AR 10128]
- Estonian Ministry of Education and Research [T099]
- Estonian Science Foundation [MJD213, G8147]
Thin films of SnS are deposited onto molybdenum-coated soda lime glass substrates using the high-vacuum evaporation technique at a substrate temperature of 300 degrees C. The as-deposited SnS layers are then annealed in three different media: (1) H2S, (2) argon, and (3) vacuum, for different periods and temperatures to study the changes in the microstructural properties of the layers and to prepare single-phase SnS photoabsorber films. It is found that annealing the layers in H2S at 400 degrees C changes the stoichiometry of the as-deposited SnS films and leads to the formation of a dominant SnS2 phase. Annealing in an argon atmosphere for 1 h, however, causes no deviations in the composition of the SnS films, though the surface morphology of the annealed SnS layers changes significantly as a result of a 2 h annealing process. The crystalline structure, surface morphology, and photosensitivity of the as-deposited SnS films improves significantly as the result of annealing in vacuum, and the vacuum-annealed films are found to exhibit promising properties for fabricating complete solar cells based on these single-phase SnS photoabsorber layers. (C) 2014 American Vacuum Society.
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