The Influence of Layer Number on Properties of Cu2ZnSnS4 Films

Authors : Güven TURGUT, Eyüp Fahri KESKENLER

Pages : 79-85

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Publication Date : 2017-10-31

Article Type : Research Paper

Abstract :In present study, Cu 2 ZnSnS 4 thin films were deposited via single-step sol-gel spin coating process.  The effect of layer number on the structural, morphological and optical properties was investigated. XRD results showed that 7 layered film had crystal structure but other films had amorphous structure. 7 layered film grown at insert ignore into journalissuearticles values(112); preferential orientation and it had another peak of insert ignore into journalissuearticles values(200);. AFM analysis indicated that any particle on surface of 3, 4 and 5 layered films was not observed and the particle structure was observed for 6 and 7 layer films. The crystallite sizes for 6 layer films were very small, but 7 layer films had both small and big particles on its surface. This particle structure was not homogenous for the film surfaces. From UV-VIS studies, optical band gap of 3, 4, 5, 6 and 7 layered films were found to be    1.88 eV, 1.82 eV, 1.73 eV, 1.68 eV and 1.48 eV, respectively. This result indicates that 7 layered film is very suitable for solar cell as an absorber layer.
Keywords : Cu2ZnSnS4, Sol gel, Optical Properties