“…In the first case (Cell-1), an aluminum film was evaporated with a thickness of 5 µm and, subsequently, Rapid Thermal Annealing (RTA) at 650 • C for 180 s was carried out. In the second case (Cell-2), aluminum paste was used in order to obtain a film with a thickness of 20 µm, after which an RTA was performed at 850 • C for 180 s. Finally, in the third case (Cell-3), an RTA at 650 • C for 120 s was performed after evaporation of a 5 µm thick aluminum film [39,40]. The solar cells were characterized both at Standard Test Conditions (STC) and in the dark.…”