Improvement performance of two-step electrodepositing Cu 2 MnSnS 4 thin film solar cells by tuning Cu-Sn alloy layer deposition time
Improvement performance of two-step electrodepositing Cu 2 MnSnS 4 thin film solar cells by tuning Cu-Sn alloy layer deposition time
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DOI：
10.1016/j.matchemphys.2018.03.009
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发表时间：
2018-06
影响因子：
4.6
通讯作者：
Jiejin Yu;H. Deng;Leilei Chen;J. Tao;Qiao Zhang;Benlong Guo;Lin Sun;P. Yang;Xiaoping Zheng-Xiaoping-Zhen
中科院分区：
文献类型：
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作者：
Jiejin Yu;H. Deng;Leilei Chen;J. Tao;Qiao Zhang;Benlong Guo;Lin Sun;P. Yang;Xiaoping Zheng-Xiaoping-Zhen
A green and cost-effective two-step electrodeposition process has been used to prepare earth-abundant Cu2MnSnS4(CMTS) thin films. We have systematically studied the influence of tuning the deposition time of Cu-Sn alloy layer from 8 to 15 min on the properties of CMTS thin films and the performance of the solar cells. This process increases the content of Cu and Sn, and the thickness of the final CMTS thin films, and further tunes the band gap from 1.43 to 1.35 eV. Moreover, the amount of MnS secondary phase has been reduced, the crystallinity and morphology of the absorber layers has been significantly improved, and eventually the photovoltaic performance has been remarkably enhanced. Nevertheless, a further increase in the deposition time degrades the crystalline quality of the thin films and forms the Cu2SnS3secondary phase. Particularly, the efficiency of the CMTS thin film solar cells improved nearly tenfold from 0.08% to 0.76% when the Cu-Sn alloy layer deposition time is optimized to 12 min. Notably, this is the highest efficiency for an electrodeposited CMTS solar cell up to now, which offers a promising alternative approach for the preparation of CMTS solar cell devices.
