Fig. 4: The surfaced ions distribution of mixed tin-lead perovskite thin films during phase reconstruction and the phase reconstruction processes in air-aged tin-lead perovskite thin films.
From: Unveiling the nexus between irradiation and phase reconstruction in tin-lead perovskite solar cells
a–c TOF-SIMS mapping signals of (a) FA+, (b) Pb+, (c) Sn+ on the mixed FASn0.5Pb0.5I3 perovskite films in stage III. The scale bar is 100 µm. d Digital images of the fresh FA0.7MA0.3Sn0.5Pb0.5I3 perovskite films, the films with air exposure, and the films with continuous blue-light irradiation after air exposure. e Evolution of normalized PL spectrum results of FA0.7MA0.3Sn0.5Pb0.5I3 perovskite films with air exposure. f Evolution of normalized PL spectrum results of FA0.7MA0.3Sn0.5Pb0.5I3 perovskite films with air exposure under continuous blue-light irradiation (Mercury lamp, 13 W cm−2).
