Rapid development in two-dimensional layered perovskite materials and their application in solar cells

Two-dimensional (2D) layered organic-inorganic hybrid perovskite (2D PVK) materials have been recently developed as a novel candidate for photovoltaic application with high stability and a maximum power conversion efficiency of 12.5%. This article summarized these newly emerging 2D PVK materials and their uses in solar cells. The structural, physical, and chemical properties as well as the classification of 2D PVK materials are discussed. The photovoltaic performance parameters of various 2D perovskite solar cells (2D PSCs) are summarized and their device stability is compared with conventional 3D perovskite solar cells (3D PSCs). It has been concluded that 2D PVKs show greater stability upon humidity, heat stress, and light intensity as compared to 3D analogues and act as a class of promising materials for application in solar cells. (C) 2017 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.