An above-room-temperature ferroelectric two-dimensional halide double perovskite with direction dependent properties

Herein, we introduce a new non-centrosymmetric 2D halide double perovskite Cl 0.26 Br 3.74 PA 4 AgSbBr 8 (CPAS) with A-site linker, 3-chloropropylamine. CPAS exhibits above room-temperature ferroelectricity, with spontaneous polarization of 3.4 μC cm −2 . The polarization is direction dependent, whe...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2024-07, Vol.60 (61), p.7898-7901
Main Authors: Rajput, Shubham Ajaykumar, Antharjanam, Sudhadevi, Chandiran, Aravind Kumar
Format: Article
Language:English
Subjects:
Charge materials
Ferroelectricity
Optical properties
Perovskites
Polarization
Room temperature
Temperature dependence
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Summary:Herein, we introduce a new non-centrosymmetric 2D halide double perovskite Cl 0.26 Br 3.74 PA 4 AgSbBr 8 (CPAS) with A-site linker, 3-chloropropylamine. CPAS exhibits above room-temperature ferroelectricity, with spontaneous polarization of 3.4 μC cm −2 . The polarization is direction dependent, where ferroelectricity is observed perpendicular to octahedral sheets but mere capacitive phenomena between the sheets. The material shows defect- or phonon-mediated charge conduction. The optical properties reveal a bandgap of 2.48 eV with blue emission.
ISSN:1359-7345
1364-548X
1364-548X
DOI:10.1039/d4cc01520g