High efficient large-area perovskite solar cells based on paintable carbon electrode with nio nanocrystal-carbon intermediate layer

Abstract

The photovoltaic performance of low temperature paintable carbon-based perovskite solar cells (LC-PSCs) was improved significantly by inserting a NiO nanocrystal-carbon (NiO-C) intermediate layer between the perovskite and carbon electrode. Finally, a champion efficiency of 12.5% in a large active area of 1 cm2 was demonstrated in LC-PSCs with NiO-C intermediate layer, which originated from enhanced hole extraction and transport, reduced carrier recombination and improved energy level alignment. Meanwhile, ultrahigh ambient stability of LCPSCs was further improved by modifying with NiO-C.