Mahewara, R.B. and Ravangave, L.S. 2020. Effect of copper concentration on structure morphology and optical band gap of spray deposited CZTS thin films . International Journal of Research in Informative Science Application & Techniques (IJRISAT). 4, 5 (May 2020), 16–25. DOI:https://doi.org/10.46828/ijrisat.v4i5.92.