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Issue 29, 2017
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Photoluminescent-dielectric duple switch in a perovskite-type high-temperature phase transition compound: [(CH3)3PCH2OCH3][PbBr3]

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Abstract

A bistable optical–electrical duple switch belongs to a class of highly satisfying intelligent materials that can transform optical and electrical responses simultaneously in one device. A perovskite-type high-temperature phase transition compound with one-dimensional chain-like crystal structure, ([(CH3)3PCH2OCH3][PbBr3], 1), displays remarkable bistable photoluminescent-dielectric duple switching behaviors. The noteworthy order–disorder transition of the phosphonium cation and the motions of anions contribute to the phase transition, leading to the space group P21/c at a low temperature phase to C2/c at a high temperature phase. 1 exhibits a prominent step-like dielectric anomaly at 401.0 K and demonstrates novel optical properties with a band gap of 3.54 eV. The photoluminescence intensity suddenly declines from 398 K to 408 K, which may be attributed to the occurrence of phase transition. The electron cloud distributions of the frontier orbital in compound 1 have been calculated using a DFT program.

Graphical abstract: Photoluminescent-dielectric duple switch in a perovskite-type high-temperature phase transition compound: [(CH3)3PCH2OCH3][PbBr3]

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Publication details

The article was received on 16 May 2017, accepted on 26 Jun 2017 and first published on 27 Jun 2017


Article type: Paper
DOI: 10.1039/C7DT01780D
Citation: Dalton Trans., 2017,46, 9528-9534
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    Photoluminescent-dielectric duple switch in a perovskite-type high-temperature phase transition compound: [(CH3)3PCH2OCH3][PbBr3]

    F. Geng, D. Wu, L. Zhou, P. Shi, P. Li, J. Gao, X. Zheng, D. Fu and Q. Ye, Dalton Trans., 2017, 46, 9528
    DOI: 10.1039/C7DT01780D

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