Preparation and characterization of CuInS2 absorber layers by sol-gel method for solar cell applicationsM. H. Amerioun, M. E. Ghazi, M. Izadifard and B. BahramianEur. Phys. J. Plus, 131 4 (2016) 113DOI: https://doi.org/10.1140/epjp/i2016-16113-8