Issue 4, 2018

[C6H14N]PbI3: a 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 a one-dimensional ABX3 perovskite-like structure, has been synthesized. It is notable that MPIP undergoes a structural phase transition (SPT) at Tc ≅ 202 K, as 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 a 1-methylpiperidinium cation, which accounts for its SPT and striking dielectric response. Besides this, MPIP shows semiconducting behaviour with an optical bandgap of ∼2.48 eV, comparable to 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.

Graphical abstract: [C6H14N]PbI3: a one-dimensional perovskite-like order–disorder phase transition material with semiconducting and switchable dielectric attributes

Supplementary files

Article information

Article type
Research Article
Submitted
18 Nov 2017
Accepted
24 Jan 2018
First published
26 Jan 2018

Inorg. Chem. Front., 2018,5, 897-902

[C6H14N]PbI3: a 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, 5, 897 DOI: 10.1039/C7QI00722A

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