Effect of excess selenium in the formation of Cu2Zn1.5Sn1.2(S0.9+Se0.1)4 alloys for solar cell applications
https://doi.org/10.17586/2220-8054-2016-7-3-509-512
Abstract
Copper zinc tin sulfide/selenide Cu2ZnSn(S, Se)4 (CZTSSe) is an alternative promising material for solar cell applications. It exhibits a high optical absorbance and tunable band gap. We have investigated the effect of excess selenium on the formation of CZTSSe phase which was prepared by the thermal melt method. The CZTSSe alloys were characterized by X-ray diffraction (XRD), Raman spectroscopy and UV-VIS spectroscopy. The crystallographic structure and phase were confirmed by X-ray diffraction and Raman spectroscopic techniques. In Raman spectroscopy, we found that the phase shifts from 327 cm−1 to 338 cm−1 when the selenium content excess is 5 %. In optical studies, a band gap for the CZTSSe alloys of about 1.43 eV to 1.44 eV was observed.
Supporting agencies: The authors thank Inorganic and Physical Chemistry (IPC-IISc, Bangalore) and Department of Physics (IISc, Bangalore) for XRD and UV-Visible characterizations
About the Authors
Chinnaiyah Sripan
Centre for Nanoscience and Technology, Pondicherry University
India
India
Pondicherry
Annamraju Kasi Viswanath
Centre for Nanoscience and Technology, Pondicherry University
India
India
Pondicherry
R. Ganesan
Indian Institute of Science
India
India
Department of Physics.
Bangalore, Karnataka
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Review
For citations:
Sripan Ch., Viswanath A., Ganesan R. Effect of excess selenium in the formation of Cu2Zn1.5Sn1.2(S0.9+Se0.1)4 alloys for solar cell applications. Nanosystems: Physics, Chemistry, Mathematics. 2016;7(3):509-512. https://doi.org/10.17586/2220-8054-2016-7-3-509-512
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