4.7 Review

Origin and physical effects of edge states in two-dimensional Ruddlesden-Popper perovskites

Journal

ISCIENCE
Volume 25, Issue 6, Pages -

Publisher

CELL PRESS
DOI: 10.1016/j.isci.2022.104420

Keywords

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Funding

  1. Australian Research Council (ARC) [FT210100806, DP220100603, IC180100005]
  2. China Scholarship Council [201906750009]
  3. Australian Research Council [FT210100806] Funding Source: Australian Research Council

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This review introduces the recent progress on the edge states of 2D RP perovskites, including their origin, optoelectronic properties, and current debates. It is of great significance for the development of optoelectronic devices.
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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