High-efficiency two-dimensional Ruddlesden–Popper perovskite solar cells

Thin-film solar cells were fabricated using layered two-dimensional perovskites with near-single-crystalline out-of-plane alignment, which facilitates efficient charge transport leading to greatly improved power conversion efficiency with technologically relevant stability to light exposure, humidity and heat stress. Solar cells using hybrid organic–inorganic perovskite materials as the active layer have made great leaps in power conversion...