Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 2, Issue 2, Pages 500-509Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta13533k
Keywords
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Funding
- National High Technology Research and Development Program of China (863 Program) [2011aa050529]
- National Natural Science Foundation of China [51204214, 51222403]
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Earth-abundant Cu2ZnSnS4 (CZTS) has been confirmed as a promising semiconductor material for thin film solar cells. To meet the requirements of high-efficiency and low-cost for photovoltaic technologies, a modified thermal decomposition sol-gel method with low-cost and low-toxicity for CZTS thin film preparation is presented, and the detailed formation mechanism of the thin film is investigated to obtain an optimized process. By introducing non-aqueous thiourea-metal-oxygen sol-gel processing, as well as applying extrinsic dopants and chemical etching, high-quality and phase-controlled CZTS thin films with homogeneous elemental distribution and a low impurity content have been synthesized. Based on the modified sol-gel method, solar cells with a structure of Ni:Al/ZAO/i-ZnO/CdS/CZTS/Mo/glass have been fabricated, and a power conversion efficiency of 5.10% is obtained, indicating its potential for high-throughput and high power conversion efficiency photovoltaic devices.
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