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Deposition of Cu2ZnSnS4 (CZTS) prepared by a solution route for solar cells applications

Abstract : As a promising candidate as absorber layer in thin film solar cells, the Cu2ZnSnS4 (CZTS) material has gained a broad interest over recent years for the production of low-cost solar cells due to its direct and tunable band gap energy, high optical absorption coefficients and also due to the abundance and the non-toxicity of all its constituents. In addition, to solve the problem of expensive and complicated vacuum-based synthesis methods, simple and low-cost methods have been developed for the preparation of this material. In this present work, the CZTS thin films have been prepared using a solution route namely sol-gel, which is a simple and low cost method for a large production of thin films materials and spin coated onto glass substrates. The sol-gel precursor solution was made from metal salts of copper (II) chloride (CuCl2), zinc (II) chloride (ZnCl2), Tin (IV) chloride (SnCl4), and thiourea (CS (NH2)2) dissolved into a mixture of ethanol/water as solvent. The X-ray diffraction studies showed the formation of a kesterite structure with peaks corresponding to (112) and (220) directions. The Raman spectrum indicated the presence of the principal kesterite peak at 336 cm-1 and the existence of a strange peak at 424 cm-1 which could be attributed to the binary compound Cu2S. The absorbance spectrum has been recorded for the estimation of the band gap. The CZTS thin film can be made using a simple spin coating technique, but improvements in the film properties by a suitable annealing time and temperature as well as annealing environment and post deposition needs have to be done for making a quality photovoltaic absorber.
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Submitted on : Thursday, January 9, 2020 - 4:46:27 PM
Last modification on : Tuesday, December 7, 2021 - 5:50:03 PM

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  • HAL Id : hal-02434105, version 1

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Joël Hervé Nkuissi Tchognia, Youssef Arba, Bouchaib Hartiti, Khalid Dakhsi, J.M. Ndjaka, et al.. Deposition of Cu2ZnSnS4 (CZTS) prepared by a solution route for solar cells applications. Journal of Materials and Environmental Science , Mohammed Premier University, 2015, 6 (8), pp.2120-2124. ⟨hal-02434105⟩

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