Structural, wettability, optical, and electrical modifications by varying precursor solutions of sprayed Co3O4 thin films for solar cell applicationsYounes Nezzari, Warda Darenfad, Kamel Mirouh, Noubeil Guermat and Nadir BouarissaEur. Phys. J. B, 98 3 (2025) 44DOI: https://doi.org/10.1140/epjb/s10051-025-00889-3