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Issue 9, 2017
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[C5H12N]CdCl3: an ABX3 perovskite-type semiconducting switchable dielectric phase transition material

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Abstract

A new organic–inorganic ABX3 perovskite-type semiconducting hybrid, N-methylpyrrolidinium trichlorocadmate (MPCC), has been synthesized. It is found that MPCC exhibits semiconducting behaviour with an optical bandgap of ∼4.65 eV, as well as remarkable dielectric switching properties. It displays a structural phase transition (SPT) at Tc = 254 K, being confirmed by DSC and specific heat measurements. Dielectric measurements display distinct step-like anomalies around Tc, suggesting MPCC as a switchable dielectric material. Variable temperature single-crystal X-ray diffraction reveals that symmetry-breaking occurs from Pnma (at 280 K, >Tc) to P21/c (at 230 K, <Tc), which is attributed to the ordering of the disordered N-methylpyrrolidinium (MP) cation. The most distinct difference between its low- and high-temperature structures is the order–disorder dynamics of the MP cation, which mainly contribute to the SPT and switchable dielectric activities of MPCC. This finding paves a new way for designing multi-featured ABX3-type SPT hybrids by choosing disordered cationic moieties.

Graphical abstract: [C5H12N]CdCl3: an ABX3 perovskite-type semiconducting switchable dielectric phase transition material

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Publication details

The article was received on 30 May 2017, accepted on 19 Jun 2017 and first published on 20 Jun 2017


Article type: Research Article
DOI: 10.1039/C7QI00301C
Citation: Inorg. Chem. Front., 2017,4, 1485-1492
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    [C5H12N]CdCl3: an ABX3 perovskite-type semiconducting switchable dielectric phase transition material

    A. Zeb, Z. Sun, T. Khan, M. A. Asghar, Z. Wu, L. Li, C. Ji and J. Luo, Inorg. Chem. Front., 2017, 4, 1485
    DOI: 10.1039/C7QI00301C

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