Fig. 6: Stability of PSCs.

a The pictures of the control and 2DPAA-treated perovskite films aged in ambient air with RH of 60% ~ 80% and temperature of 25 °C. b, c Temperature-dependent conductivity of the control and 2DPAA-treated device. d The long-term shelf stability for the control and 2DPPA-treated device. e Dynamic MPP tracking of the unsealed control and 2DPAA-treated device under 1 sun illumination (white light LED).