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Title: Molecular engineering toward coexistence of dielectric and optical switch behavior in hybrid perovskite phase transition material
Authors: Hu, Yuzhong
Zhang, Hongbo
Chong, Wee Kiang
Li, Yongxin
Ke, Yujie
Ganguly, Rakesh
Morris, Samuel Alexander
You, Lu
Yu, Ting
Sum, Tze Chien
Long, Yi
Fan, Hong Jin
Keywords: Perovskite Crystals
Inorganic-organic Hybrid Perovskite
Issue Date: 2018
Source: Hu, Y., Zhang, H., Chong, W. K., Li, Y., Ke, Y., Ganguly, R., … Fan, H. J. (2018). Molecular engineering toward coexistence of dielectric and optical switch behavior in hybrid perovskite phase transition material. The Journal of Physical Chemistry A, 122(31), 6416-6423. doi:10.1021/acs.jpca.8b05693
Series/Report no.: The Journal of Physical Chemistry A
Abstract: Organic–inorganic hybrid perovskites with considerable dielectric differences near the phase transition are potential candidates as phase transition materials (PTMs). However, compared with traditional PTMs, which require multiple switchable channels, the hybrid perovskites so far show only switching behavior in dielectric constants. We herein report a new crystal design strategy and successful synthesis of a two-dimensional perovskite (C6H5C2H4NH3)2MnCl4. In this hybrid perovskite, the manganese chloride octahedron is a crystal field sensitive luminescent molecular system. The distortion level of MnCl64– also depends on temperature during the order–disorder phase transition. Hence, such a manganese octahedron-based perovskite can exhibit switching behaviors in both dielectric and optical properties. We observe a 14% decrease in optical absorption and 1.6 times increase in dielectric constant during the phase transition at 365 K. In addition, the characteristic photoluminescence decreases by 17% in intensity. Such a molecule-based crystal design paves a new way to explore multifunctional PTMs based on organic–inorganic perovskites.
ISSN: 1089-5639
DOI: 10.1021/acs.jpca.8b05693
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry A, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
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