Photovoltaic Materials, Devices, and Technologies

Effects of Se vapor annealing on water-based solution-processed Cu2ZnSn(S,Se)4 thin-film solar cells

[+] Author Affiliations
Minlin Jiang, Quan Tao, Fei Lan, Christian G. Bottenfield, Guangyong Li

University of Pittsburgh, Department of Electrical and Computer Engineering, Pittsburgh, Pennsylvania 15261, United States

Xingzhong Yan

Texas A&M University, College of Science and Engineering, Texas 75428, United States

J. Photon. Energy. 5(1), 053096 (Feb 27, 2015). doi:10.1117/1.JPE.5.053096
History: Received October 2, 2014; Accepted February 3, 2015
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Abstract.  Among various deposition techniques to deposit Cu2ZnSn(S,Se)4 (CZTSSe) thin films, solution-based processes have attracted considerable attention because of their potentially low cost. Most of the reported solution-based methods are based on nonaqueous solvents, such as hydrazine, and organic solvents. We report the deposition of CZTSSe thin films and fabrication of CZTSSe solar cells by a water-based, solution-processed method followed by Se vapor annealing. The effects of Se vapor feeding time on the properties of CZTSSe thin films and the performance of CZTSSe solar cells are investigated. The ratio of Se/(Se+S) can be tuned by changing the Se vapor feeding time. Our results indicate that extending the Se vapor feeding time increases the band gap, slightly increases the lattice constant, and significantly improves the morphologies of the CZTSSe thin films. A remarkable enhancement in the performance was observed from the CZTSSe solar cells annealed with a longer Se vapor feeding time compared with those without Se feeding.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Minlin Jiang ; Quan Tao ; Fei Lan ; Christian G. Bottenfield ; Xingzhong Yan, et al.
"Effects of Se vapor annealing on water-based solution-processed Cu2ZnSn(S,Se)4 thin-film solar cells", J. Photon. Energy. 5(1), 053096 (Feb 27, 2015). ; http://dx.doi.org/10.1117/1.JPE.5.053096


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