Figure 5.
a) The PCE of the fabricated devices as a function of storage time in ambient air (25 °C and RH: 60 ± 5%) and b) the surface SEM images of the studied films after 30‐day aging time.
a) The PCE of the fabricated devices as a function of storage time in ambient air (25 °C and RH: 60 ± 5%) and b) the surface SEM images of the studied films after 30‐day aging time.