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[C5H12N]CdCl3: An ABX3 Perovskite–type Semiconducting Switchable Dielectric Phase Transition Material

Abstract

A new organic-inorganic ABX3 perovskite-type semiconducting hybrid, N-methylpyrrolidinium trichlorocadmate (MPCC), has been synthesized. It is found that MPCC exhibits the semiconducting behaviour with the 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 the Tc, suggesting MPCC as a switchable dielectric material. Variable temperatures single-crystal X-ray diffraction reveal 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 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.

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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, Accepted Manuscript
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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, Accepted Manuscript , DOI: 10.1039/C7QI00301C

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