Title of article
Effect of Cu/(Zn+Sn) ratio on the properties of co-evaporated Cu2ZnSnSe4 thin films
Author/Authors
Suresh Babu، نويسنده , , G. and Kishore Kumar، نويسنده , , Y.B. and Uday Bhaskar، نويسنده , , P. and Raja Vanjari، نويسنده , , Sundara، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2010
Pages
6
From page
221
To page
226
Abstract
The effect of Cu/(Zn+Sn) ratio on the properties of Cu2ZnSnSe4 (CZTSe) thin films is investigated. CZTSe thin films with Cu/(Zn+Sn) ratio in the range 0.85–1.15 are deposited using 4-source co-evaporation technique onto glass substrates held at a substrate temperature Ts=623 K and post-deposition annealed at Tpa=723 K for 1 h in the selenium atmosphere. Powder X-ray diffraction (XRD) patterns reveal that CZTSe films deposited with Cu/(Zn+Sn) ratio in the range 0.90–1.10 are single phase and polycrystalline. CZTSe films, deposited with Cu/(Zn+Sn) ratio of 0.85 contain ZnSe as secondary phase and films with ratio of 1.15 contain Cu2−XSe as the secondary phase. The films are found to exhibit kesterite structure. Band gap of the films is found to increase with decrease in Cu/(Zn+Sn) ratio. Electrical resistivity of the films is found to lie in the range 0.02–23-Ω-cm depending on Cu/(Zn+Sn) ratio.
Keywords
Thin films , Cu2ZnSnSe4 , Co-evaporation , characterization , Solar cell absorber
Journal title
Solar Energy Materials and Solar Cells
Serial Year
2010
Journal title
Solar Energy Materials and Solar Cells
Record number
1483505
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