This study describes the first perovskite‐based redox resistive switching memory using CH₃NH₃PbBr₃ nanoparticles (NPs) dispersed in an insulating solid polymer electrolyte, poly(ethylene oxide) (PEO), and scrutinizes it in detail. Herein, PEO is chosen not only to perform a matrix function due to its ionic conductivity but also to support a preservative material surrounding the CH₃NH₃PbBr₃ NPs to improve their stability. Further, it is revealed that PEO can serve as the chelating agent to coordinate with PbBr₂/CH₃NH₃PbBr₃ NPs in consequence of the direct interaction between Pb²⁺ cations and electron pairs of ether oxygen on the PEO chain to provide a host medium for the Pb²⁺ cations on both amorphous and crystalline phases. Consequently, it facilitates the associated redox‐based reactions to result in the metallic filament formation in the derived device, leading to the write‐once‐read‐many times resistive switching behavior. The field‐effect scanning electron microscopy and X‐ray photoelectron spectroscopy analyses are conducted to ascertain the detailed mechanism. It is unveiled that a stable dendritic‐like filament is grown in the CH₃NH₃PbBr₃ NPs:PEO hybrid film, which is thus proposed to be the origin of the stable low resistive state and recovery of the conductive path during the reverse bias scan. This study presents a new perspective on the perovskite‐based resistive memory devices.

中文翻译：

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基于氧化还原的电阻切换存储设备，由有机-无机杂化钙钛矿/聚合物复合薄膜组成

这项研究描述了第一个基于钙钛矿的氧化还原电阻开关存储器，该存储器使用分散在绝缘固体聚合物电解质，聚环氧乙烷（PEO）中的CH ₃ NH ₃ PbBr ₃纳米颗粒（NPs），并对其进行了详细的研究。在本文中，选择PEO不仅由于其离子传导性而起基质功能，而且还支持围绕CH ₃ NH ₃ PbBr ₃ NP的防腐材料以提高其稳定性。此外，揭示了由于Pb之间的直接相互作用，PEO可以用作螯合剂以与PbBr ₂ / CH ₃ NH ₃ PbBr ₃ NP配合。PEO链上的²⁺阳离子和醚氧电子对为非晶相和结晶相上的Pb ²⁺阳离子提供宿主介质。因此，它有助于相关的基于氧化还原的反应，导致派生器件中形成金属丝，从而导致多次写入多次读取的电阻切换行为。进行了场效应扫描电子显微镜和X射线光电子能谱分析，以确定详细的机理。揭示了在CH ₃ NH ₃ PbBr _3中生长出稳定的树突状细丝NPs：PEO杂化膜，因此被认为是稳定的低电阻状态和反向偏置扫描过程中导电路径恢复的起源。这项研究为基于钙钛矿的电阻式存储设备提供了新的视角。