Enabling room-temperature processed highly efficient and stable 2D Ruddlesden–Popper perovskite solar cells with eliminated hysteresis by synergistic exploitation of additives and solvents

Abstract

In 2D RP perovskites, two competitive processes of NH₄Cl and DMSO additions reach a delicate balance in dual-treated devices, which deliver a maximum PCE up to 13.41% with excellent air-stability and eliminated hysteresis.