AI Article Synopsis
- - Hybrid organic-inorganic perovskites (HOIPs) are gaining attention for their impressive properties and easy synthesis, but most studies focus on 3D perovskites, with 2D ferroelastic variations being less explored.
- - The researchers synthesized a new 2D lead-based perovskite (CNHBr)PbBr, which exhibits a ferroelastic phase transition at temperatures of 392/384 K and has a direct band gap of 2.877 eV.
- - The material produces blue light under UV illumination with a quantum yield of 5.06%, and the study introduces three structural descriptors to help understand the connection between structural distortion and emission characteristics.
Article Abstract
Hybrid organic-inorganic perovskites (HOIPs) have attracted much attention due to their excellent properties and easy synthesis. As far as we know, most documented ferroelastics mainly focus on the 3D (three-dimensional) perovskites, the 2D monolayer perovskite ferroelastics are rarely reported before. In this work, we synthesized a 2D lead-based perovskite (CNHBr)PbBr () (CNHBr = 5-bromoamylamine cation) by introducing flexible chain organic cations. The evolution of ferroelastic domains observed by a polarized light microscope confirms that compound undergoes a ferroelastic phase transition at 392/384 K. In addition, its direct band gap is 2.877 eV. Interestingly, the material emits an attractive blue light (quantum yield 5.06%) under UV light. Three structural descriptors are introduced to quantitatively analyze the relationship between structural distortion and the shape of emission peak. This work provides a way to design multifunctional perovskite-type materials.
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| http://dx.doi.org/10.1021/acs.inorgchem.3c01552 | DOI Listing |
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