Large‐Area, Solution‐Processed, Hierarchical MAPbI3 Nanoribbon Arrays for Self‐Powered Flexible Photodetectors,Advanced Optical Materials

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Large‐Area, Solution‐Processed, Hierarchical MAPbI3 Nanoribbon Arrays for Self‐Powered Flexible Photodetectors
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2018-08-30 , DOI: 10.1002/adom.201800615
Seongdong Lim ₁ , Minjeong Ha ₁ , Youngsu Lee ₁ , Hyunhyub Ko ₁

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Organic–inorganic perovskites with micro‐/nanostructures exhibit outstanding optical and electrical properties, thus attracting increased attention as components of high‐performance optoelectronic devices, but the fabrication of complex micro‐/nanostructured perovskites shows limited success. This study describes the fabrication of hierarchical methylammonium lead iodide (MAPbI₃) nanoribbon (NR) arrays with controlled internal nanorod structures by simple spin‐coating with solvent treatment process and investigates the suitability of these arrays for high‐performance and multifunctional photodetectors. In the UV‐to‐800‐nm range, photodetectors based on the hierarchical MAPbI₃ NR arrays exhibit specific detectivities 18.1–23.7 times higher than those of photodetectors based on MAPbI₃ films due to the effective photon management and reduced charge trap states in the hierarchical MAPbI₃ NR arrays. The solution‐processed hierarchical MAPbI₃ NRs can be fabricated on various substrates including ultrathin polyimide, which facilitates the development of flexible photodetectors with highly stable photoresponse under bending strain. Furthermore, the ferroelectricity and the highly anisotropic alignment of MAPbI₃ NR arrays allow multifunctional photodetectors capable of self‐powered and polarization‐sensitive light detection, respectively. The strategy used to fabricate hierarchical organic–inorganic perovskite NR arrays is believed to be applicable to other types of perovskites and can probably be used to construct various optoelectronic devices based on hierarchical nanostructures.

中文翻译：

适用于自供电柔性光电探测器的大面积，溶液处理的分层MAPbI3纳米带阵列

具有微/纳米结构的有机-无机钙钛矿具有出色的光学和电学性能，因此作为高性能光电器件的组件受到越来越多的关注，但是制造复杂的微/纳米结构的钙钛矿却取得了有限的成功。这项研究描述了通过简单的旋涂和溶剂处理工艺来制造具有受控内部纳米棒结构的分级甲基铵碘化铅（MAPbI ₃）纳米带（NR）阵列，并研究了这些阵列对高性能和多功能光电探测器的适用性。在紫外至800 nm范围内，基于分层MAPbI ₃ NR阵列的光电探测器的特定检出率比基于MAPbI的光电探测器高18.1至23.7倍由于有效的光子管理和分层MAPbI ₃ NR阵列中电荷陷阱状态的减少，获得了₃部影片。可在包括超薄聚酰亚胺在内的各种基板上制造经过溶液处理的分级MAPbI ₃ NR，这有助于开发在弯曲应变下具有高度稳定的光响应的柔性光电探测器。此外，MAPbI ₃的铁电性和高度各向异性排列NR阵列允许多功能光电探测器分别具有自供电和偏振敏感光探测功能。据信，用于制造分层有机-无机钙钛矿NR阵列的策略可适用于其他类型的钙钛矿，并且可以用于构建基于分层纳米结构的各种光电器件。

更新日期：2018-08-30

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