Graphene/4H-SiC Schottky photodetector operating in the visible spectrum range Elisa D. Mallemace, Teresa Crisci, Mariano Gioffrè, Mario Medugno, Francesco G. Della Corte, Sandro Rao and Maurizio Casalino EPJ Web Conf., 287 (2023) 14006 Published online: 18 October 2023 DOI: 10.1051/epjconf/202328714006