Research on structure of Cu<sub>2</sub>ZnSn(S, Se)<sub>4</sub> thin films with high Sn-related phases

Peng-yu Li; Yu-ming Xue; Hao Liu; Dan Xia; Dian-you Song; Shao-jun Feng; Hai-tao Sun; Bing-bing Yu; Zai-xiang Qiao

doi:10.1007/s11801-016-6055-9

Optoelectronics Letters ›› , Vol. 12 ›› Issue (6) : 446-449. DOI: 10.1007/s11801-016-6055-9

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Research on structure of Cu₂ZnSn(S, Se)₄ thin films with high Sn-related phases

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Abstract

Cu₂ZnSn(S, Se)₄ (CZTSSe) thin films were deposited on flexible substrates by three evaporation processes at high temperature. The chemical compositions, microstructures and crystal phases of the CZTSSe thin films were respectively characterized by inductively coupled plasma optical emission spectrometer (ICP-OES), scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman scattering spectrum. The results show that the single-step evaporation method at high temperature yields CZTSSe thin films with nearly pure phase and high Sn-related phases. The elemental ratios of Cu/(Zn+Sn)=1.00 and Zn/Sn=1.03 are close to the characteristics of stoichiometric CZTSSe. There is the smooth and uniform crystalline at the surface and large grain size at the cross section for the films, and no other phases exist in the film by XRD and Raman shift measurement. The films are no more with the Sn-related phase deficiency.

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Peng-yu Li, Yu-ming Xue, Hao Liu, Dan Xia, Dian-you Song, Shao-jun Feng, Hai-tao Sun, Bing-bing Yu, Zai-xiang Qiao. Research on structure of Cu₂ZnSn(S, Se)₄ thin films with high Sn-related phases. Optoelectronics Letters, , 12(6): 446‒449 https://doi.org/10.1007/s11801-016-6055-9

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This work has been supported by the National High Technology Research and Development Program of China (No.2012AA050701), and the Innovation and Entrepreneurship Training Program for College Students in Tianjin (No.201410060036).