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Composition control in Cu2ZnSnS4 thin films by a sol–gel technique without sulfurization

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Abstract

Kesterite Cu2ZnSnS4 (CZTS) thin films with a smooth, compact and crack-free morphology are obtained via a sol–gel method without sulfurization process. Non-toxic ethylene glycol is selected as solvent, while Cu(CH3COO)2, Zn(CH3COO)2, SnCl2·2H2O and thiourea are used as raw materials. Chemical composition dependence of CZTS films on pre-annealing and post-annealing process is comprehensively investigated. The analysis of energy dispersive X-ray indicates that composition control of CZTS films can be easily realized by the preparation of precursor solution and varying the annealing conditions.

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Acknowledgments

We appreciate Professor Zhigao Hu group providing the measurement of Raman spectra. This project was financed by the National Science Foundation of China (61106064) and the Science and Technology Commission of Shanghai Project (Grant No. 11ZR1411400, 10JC1404600).

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Authors and Affiliations

  1. Key Laboratory of Polar Materials and Devices, Department of Electronic Engineering, Ministry of Education, East China Normal University, Shanghai, 200241, China

    Kezhi Zhang, Jiahua Tao, Jun He, Weijun Wang, Lin Sun, Pingxiong Yang & Junhao Chu

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  1. Kezhi Zhang
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  2. Jiahua Tao
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  3. Jun He
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  4. Weijun Wang
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  5. Lin Sun
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  7. Junhao Chu
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Correspondence to Lin Sun.

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Zhang, K., Tao, J., He, J. et al. Composition control in Cu2ZnSnS4 thin films by a sol–gel technique without sulfurization. J Mater Sci: Mater Electron 25, 2703–2709 (2014). https://doi.org/10.1007/s10854-014-1932-0

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  • DOI: https://doi.org/10.1007/s10854-014-1932-0

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