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[C6H14N]PbI3: One-dimensional perovskite-like order-disorder phase transition material with Semiconducting and Switchable Dielectric Attributes

Abstract

An organic-inorganic semiconducting compound of 1-methylpiperidinium triiodoplumbate(II) (MPIP), adopting the one- dimensional ABX3 perovskite-like structure, has been synthesized. It is notable that MPIP undergoes a structural phase transition (SPT) at Tc ≅ 202 K, being confirmed by DSC and Cp analyses. Strikingly, MPIP exhibits remarkable switchable dielectric responses; that is, the distinct step-like anomalies in the vicinity of Tc. The switching between high-dielectric and low-dielectric states makes MPIP a potential switchable dielectric material. Single-crystal structural analysis reveals that the most distinct difference between its high-temperature phase (above Tc) and low-temperature phase (below Tc) is the order-disorder transformation of 1-methylpiperidinium cation, which account for its SPT and striking dielectric response. Besides, MPIP shows semiconducting behaviour with an optical bandgap of ~2.48 eV, comparable with some other lead-iodide perovskites. The combination of semiconducting and dielectric attributes provides a new perspective for the design of hybrid perovskites as multifunctional materials.

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Publication details

The article was received on 18 Nov 2017, accepted on 24 Jan 2018 and first published on 26 Jan 2018


Article type: Research Article
DOI: 10.1039/C7QI00722A
Citation: Inorg. Chem. Front., 2018, Accepted Manuscript
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    [C6H14N]PbI3: One-dimensional perovskite-like order-disorder phase transition material with Semiconducting and Switchable Dielectric Attributes

    A. Zeb, Z. sun, A. Khan, S. Zhang, T. Khan, M. A. Asghar and J. Luo, Inorg. Chem. Front., 2018, Accepted Manuscript , DOI: 10.1039/C7QI00722A

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