Fig. 1: Mechanism of inhibiting ion migration in Sn−Pb perovskite.
From: Synergistic immobilization of ions in mixed tin-lead and all-perovskite tandem solar cells
a J−V curves under reverse (forward) voltage scan of PSCs with different spin-coating cycles of EDADI post-treatment. Statistics of b VOC and c hysteresis index of PSCs with different durations of EDADI post-treatment. Each parameter was calculated from 10 individual devices. d The EA of devices with different durations of EDADI post-treatment. e, f 3D ToF-SIMS profiles of EDADI + HM LBG perovskite film deposited on PEDOT:PSS. g Schematic mechanisms of inhibiting ion migration of Sn–Pb perovskite films with HM doping. h EA of the control, EDADI, and EDADI + HM devices. i J−V curves of HM and EDADI + HM PSCs under reverse (forward) voltage scan.
