Novel Melamine-Decorated <110>-Oriented Lead Halide Perovskites and Their Visible Light-Triggered Nonvolatile Memory Performances with Status Monitored by Chromisms
The exploration of novel photo/thermal-responsive nonvolatile memorizers will be beneficial for the energy-saving memories. Herein, new <110>-oriented perovskites using single template melamine, i. e. [(MLAI-H2)(PbX4)]n (X=Br (α-1), Cl (α-2), MLAI=melamine) have been prepared and their structures upon irradiating of visible light have been investigated. They have been fabricated as nonvolatile memory devices with structures of ITO/[(MLAI-H2)(PbX4)]n/PMMA/Ag (device-1: X=Br, device-2: X=Cl), which can exhibit unique visible light-triggered binary nonvolatile memory performances. In detail, the silent resistive switching performances can be turned on after irradiating. Interestingly, the silent or working status can be monitored by visible chromisms. Furthermore, the light-triggered binary resistive switching mechanisms of these ITO/[(MLAI-H2)(PbX4)]n/PMMA/Ag memory devices have been clarified in terms of EPR, fluorescence, and single-crystal structural analysis. The presence of light-activated traps in <110>-oriented [(MLAI-H2)(PbX4)]n perovskites are dominated in the appearance of light-triggered resistive switching behaviors, based on which the inverted internal electrical fields can be established. According to the structural analysis, the more distorted PbX6 octahedra, higher corrugated <110>-oriented perovskite sheets, and more condensed organic-inorganic packing in Br-containing perovskite are beneficial for the stabilization of light-activated traps, which lead to the better resistive switching behavior of device-1. This work can pave a new avenue for the establishment of novel energy-saving nonvolatile memorizers used in aerospace or military industries
Year of publication: |
[2022]
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Authors: | Li, Hao-Hong ; Song, Kai-Yue ; Zhou, Pan-Ke ; Zong, Lu-Lu ; Yang, Zhen-Cong ; Chen, Zhi-Rong |
Publisher: |
[S.l.] : SSRN |
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