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Synthesis and optical properties of Cu2SnZnS4 films under different sulfur atmospheres

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Abstract

The electrodeposited precursor is a mixture of Cu, Sn, and Zn alloys, these elements form Cu6Sn5 and CuZn binary phases, and subsequently these phases transform into many binary and ternary intermediates, such as CuS, ZnS, Cu2SnS3, and Cu2ZnSnS4 (CZTS) at low annealing temperature in pure sulfur and H2S atmospheres. Finally, CZTS films can be completely formed by sulfidizing at 550 °C for 1 h in pure sulfur and H2S atmospheres. However, the initial temperature of synthesizing CZTS in H2S atmosphere is higher than that in pure sulfur atmosphere, but the highest temperature of synthesizing CZTS in H2S atmosphere is lower than that in pure sulfur atmosphere. The direct band gaps of the CZTS films synthesized at 550 °C for 1 h in pure sulfur and H2S atmospheres are about 1.54 and 1.52 eV, respectively.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (No. 61176062), the Foundation of Nanjing Institute of Technology (No. ZKJ201302), Jiangsu Innovation Practice Training Projects for College Students (No. 201311276044X), and the Undergraduate Technology Innovation of Nanjing Institute of Technology (Nos. N20130224 and N20140206).

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing, 211167, China

    Xian-Cong He, Jin-Hong Pi, Chuan-Xiang Zhang, Yu Hao & Xiao-Bo Shi

  2. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China

    Hong-Lie Shen

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  1. Xian-Cong He
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Correspondence to Xian-Cong He.

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He, XC., Shen, HL., Pi, JH. et al. Synthesis and optical properties of Cu2SnZnS4 films under different sulfur atmospheres. Rare Met. 37, 808–814 (2018). https://doi.org/10.1007/s12598-014-0350-z

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  • DOI: https://doi.org/10.1007/s12598-014-0350-z

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