The construction of a two-dimensional organic–inorganic hybrid double perovskite ferroelastic with a high Tc and narrow band gap

Two-dimensional (2D) hybrid double perovskites have attracted extensive research interest for their fascinating physical properties, such as ferroelectricity, X-ray detection, light response and so on. In addition, ferroelastics, as an important branch of ferroic materials, exhibits wide prospects i...

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Published in:Chemical science (Cambridge) 2022-05, Vol.13 (17), p.4794-4800
Main Authors: Chang-Yuan, Su, Ye-Feng, Yao, Zhi-Xu, Zhang, Wang, Ying, Chen, Ming, Pei-Zhi Huang, Zhang, Yi, Wen-Cheng, Qiao, Da-Wei, Fu
Format: Article
Language:English
Subjects:
Chain dynamics
Chemistry
Curie temperature
Energy gap
Ferroelectricity
Lead free
Microprocessors
Molecular motion
NMR
Nuclear magnetic resonance
Perovskites
Phase transitions
Physical properties
Shape memory
Single crystals
Switches
Temperature dependence
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Summary:Two-dimensional (2D) hybrid double perovskites have attracted extensive research interest for their fascinating physical properties, such as ferroelectricity, X-ray detection, light response and so on. In addition, ferroelastics, as an important branch of ferroic materials, exhibits wide prospects in mechanical switches, shape memory and templating electronic nanostructures. Here, we designed a 2D phase-transition double perovskite ferroelastic through a structurally progressive strategy. This evolution is core to our construction process from 0D to 1D and AgBi-based 2D. In this way, we successfully synthesized 2D lead-free ferroelastic (DPA)4AgBiBr8 (DPA = 2,2-dimethylpropan-1-aminium) with a high Curie temperature (Tc), which shows a narrower band gap than 0D (DPA)4Bi2Br10 and 1D (DPA)5Pb2Br9. Moreover, the mechanism of structural phase transition and molecular motion are fully characterized by temperature dependent solid-state NMR and single crystal XRD. (DPA)4AgBiBr8 injects power into the discovery of new ferroelastics or the construction and dimensional adjustment in new hybrid double perovskites.
ISSN:2041-6520
2041-6539
DOI:10.1039/d1sc07045b