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Published on: February 27, 2017
Origin and physical effects of edge states in two-dimensional Ruddlesden-Popper perovskites
Junlin Lu1,2, Chunhua Zhou3, Weijian Chen1,4
1Centre for Translational Atomaterials, Swinburne University of Technology, Hawthorn VIC 3122, Australia.
Abstract:
The edge region of two-dimensional (2D) Ruddlesden-Popper (RP) perovskites exhibits anomalous properties from the bulk region, including low energy emission and superior capability of dissociating exciton, which is highly beneficial for the optoelectronic devices like solar cells and photodetectors, denoted as "edge states". In this review, we introduce the recent progress on the edge states that have been focused on the origin and the optoelectronic properties of edge states in 2D RP perovskites. By providing theoretical frameworks and experimental observations, we elucidate the origin of the edge states from two aspects, intrinsic electronic properties and extrinsic structure distortions. Besides, we introduce the physical properties of the edge states and current debating on this topic. Finally, we present an outlook on future research about the edge states of 2D RP perovskites.
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