Line Plot from Scientific Research

The relative ageing-induced ionic loss (1 - PCE slow /PCE fast ) as a function of ageing time under 1 sun open-circuit conditions demonstrates increasing ionic losses in all systems, though with varying magnitude depending on the individual composition. The highest ageing-induced ionic losses are found in the Cs 0.05 (FA 0.60 MA 0.40 ) 0.95 Pb(I 0.60 Br 0.40 ) 3 (1.8 eV) cell, followed by FA 0.85 Cs 0.15 Pb(I 0.77 Br 0.23 ) 3 (CsFA), and 83:17 TC with the smallest losses found in MAPbI 3 (MAPI) and the Cs 0.05 (FA 0.95 MA 0.05 ) 0.95 Pb(I 0.95 Br 0.05 ) 3 + 20 wt% MACl (95:5 TH) cell, where the ion-induced ageing losses do not increase on these timescales.

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