Effect of nickel doping on the spectral sensitivity of silicon solar cells Nurillo Zikrillayev, Zoir Kenzhaev, Timur Ismailov, Ugolay Kurbanova and Bakhadir Aliyev E3S Web Conf., 434 (2023) 01036 Published online: 12 October 2023 DOI: 10.1051/e3sconf/202343401036