Structurally Dimensional Engineering in Perovskite Photovoltaics

摘要

The low-dimensional (LD) perovskites are proven to be capable of blockingmoisture erosion and thereby improving the photovoltaic device stability. Inthis review, the low-dimensional (LD) perovskite materials are carefullysummarized that are induced by A-position organic substituents, startingfrom the crystal microstructure and electronic structure of LD (2D, 1D, and0D) perovskite materials with regulating dimensions, combined with firstprinciples calculation (DFT). By further studying the thermodynamics anddynamics of crystallization nucleation and growth of LD-3D perovskite thinfilms in the heterojunction region, LD-3D heterojunction perovskite thin filmsand solar cells with controllable dimensions can be in situ prepared. VariousLD-3D perovskite structure photovoltaic devices are systematicallysummarized, which shows flexible regulation of the energy band structureand carrier transport characteristics, locks the water oxygen corrosion channelwith close-fitting conjugated structure, and improves the long-term stability ofthe LD-3D perovskite solar cells. This review is expected to provide someguidance for the perovskite development and multipurpose use through indepth understanding of the structurally dimensional engineering in perovskitephotovoltaics.