Fig. 8. Stability tests of devices in dark conditions in (a) ambient air with a relative humidity of 25–30% at room temperature and (b) ambient air with a relative humidity level of 25–30% at temperature of 50 °C. Contact angles of water droplets on the perovskite layers fabricated over the (c) net, (d) rGO-, and (e) rGO/ZrO2-doped ETLs. (f) Light stability of devices in an inert N2 environment under simulated sunlight with an intensity of 100 mW cm−2 at a temperature of 30 °C. (g) Thermal stability of devices at a temperature of 50 °C in dark conditions in an environment with a relative humidity of 25–30%.
