Journal
MATERIALS LETTERS
Volume 193, Issue -, Pages 206-209Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2017.02.002
Keywords
Semiconductors; Cu2CdSnS4; Sol-gel preparation; Thin films; Structural
Funding
- National Natural Science Foundation of China [61474045]
- State Key Basic Research Program of China [2013CB922300]
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Cu2CdSnS4 (CCTS) appears to be a promising absorber material for thin film solar cells and have been deposited on glass substrate by a direct liquid coating method. Effects of sulfurization temperature on the composition, morphology, structural and optical properties of CCTS have been investigated systematically. X-ray diffraction and Raman measurements reveal that the increase of temperature would lead to an improved crystallinity of CCTS and the secondary phase of Cu2S confirmed by Raman spectrum can be suppressed by increasing annealing temperature. The grain size of CCTS thin films is demonstrated to be improved as the annealing temperature increases with slight S-poor and Sn-poor condition. All the thin films have estimated band gap in the range of 1.31-1.14 eV, which decreases almost linearly with the increasing temperature and can be well suited for use in photovoltaics and thermoelectricity. (C) 2017 Elsevier B.V. All rights reserved.
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