Fig. 4From: Gradient Engineered Light Absorption Layer for Enhanced Carrier Separation Efficiency in Perovskite Solar Cellsa J-V curves of the PSCs, the insert is their parameter results. b The PCE histograms of PSC devices. c PCE evolution of unencapsulated devices under dark storage in a dry box (25 °C, RH 30%). d IPCE curves of the PSCsBack to article page