A bendable nickel oxide interfacial layer via polydopamine crosslinking for flexible perovskite solar cells

Abstract

Bendable nickel oxide (NiO_x) was first fabricated via polydopamine (PDA) modification and applied as an interfacial layer in flexible perovskite solar cells. PDA cross-linked NiO_x could release mechanical stress to eliminate the inherent brittleness of inorganic crystals, leading to a flexible device exhibit over 70% retention of efficiency after 1000 bending cycles.