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A promising 1D Cd-based hybrid perovskite-type for white-light emission with high-color-rendering index.

ABSTRACT: A one dimensional (1D) perovskite-type (C6H7NBr)3[CdBr5] (abbreviated 4-BAPC) was synthesized by slow evaporation at room temperature (RT). 4-BAPC crystalizes in the monoclinic system with the space group P21/c. The 1D inorganic chains are formed by corner sharing CdBr6 octahedra. Thermal measurement shows that 4-BAPC is stable up to 190 °C. Optical characterization demonstrates that the grown crystal is an indirect bandgap material with a bandgap value of 3.93 eV, which is consistent with theoretical calculations. The electronic structure, calculated using density functional theory, reveals that the valence band originates from a combination of Br-4p orbitals and Cd-4d orbitals, whereas the conduction band originates from the Cd-5s orbitals. The photoluminescence spectroscopy shows that the obtained material exhibits a broad-band white light emission with extra-high CRI of 98 under λ exc = 380 nm. This emission is mainly resulting from the self-trapped exciton recombinations within the inorganic CdBr6 octahedron, and the fluorescence within the organic conjugated ammonium salt.

SUBMITTER: Gassara M 

PROVIDER: S-EPMC9682491 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature

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A promising 1D Cd-based hybrid perovskite-type for white-light emission with high-color-rendering index.

Gassara Mahdi M   Msalmi Rawia R   Liu Xinghui X   Hassen Fredj F   Moliterni Anna A   Ben Hamadi Naoufel N   Guesmi Ahlem A   Khezami Lotfi L   Soltani Taoufik T   Naïli Houcine H  

RSC advances 20221123 52

A one dimensional (1D) perovskite-type (C<sub>6</sub>H<sub>7</sub>NBr)<sub>3</sub>[CdBr<sub>5</sub>] (abbreviated 4-BAPC) was synthesized by slow evaporation at room temperature (RT). 4-BAPC crystalizes in the monoclinic system with the space group <i>P</i>2<sub>1</sub>/<i>c</i>. The 1D inorganic chains are formed by corner sharing CdBr<sub>6</sub> octahedra. Thermal measurement shows that 4-BAPC is stable up to 190 °C. Optical characterization demonstrates that the grown crystal is an indirect  ...[more]

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