Water vapour induced instability of Cs2CdBr4 crystals

Vaněk, Přemysl; Studnička, V.; Havránková, M.

doi:10.1016/0025-5408(95)00174-3

Cited by 2 publications

(1 citation statement)

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“…Correspondingly, the length of Cd–Br bond in [CdBr 4 ] 2– tetrahedron was 2.553 Å, and the angle of Br–Cd–Br bond was 105.45°, indicating that they were irregular tetrahedrons. Compared with Cs 7 Cd 3 Br 13 , the ternary all-inorganic cadmium-based bromide reported before such as CsCdBr 3 , Cs 2 CdBr 4 , and Cs 3 CdBr 5 had some similarities in the single-crystal structures. Specifically, as shown in Figure c, CsCdBr 3 features an edge-shared [CdBr 6 ] 4– 1D chain adopting the hexagonal space group P 63 mc (No.…”

Section: Resultsmentioning

confidence: 93%

All-Inorganic Luminescent Ternary Cadmium Halide Cs₇Cd₃Br₁₃ with Two Types of Cd-Centered Polyhedrons

Qiu

Dai

et al. 2022

Inorg. Chem.

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All-inorganic metal halides comprise a class of semiconductor material with a wide range of applications. In these materials, cadmium-related materials have excellent optical properties in the field of binary quantum dots. However, ternary cadmium halides have not attracted much attention until now. Here, we successfully synthesize a ternary all-inorganic cesium cadmium bromide, Cs7Cd3Br13, and obtained its acicular single crystals through a simple solvent evaporation method. Cadmium atoms are found to be coordinated with bromine atoms in two different polyhedrons including isolated [CdBr4]2– tetrahedrons and corner-shared [CdBr6]4– octahedral chains in the unit cells of Cs7Cd3Br13. Optical properties are then measured and the needlelike single crystals are found to have an orange emission at 630 nm upon 365 nm UV light with a photoluminescence quantum yield (PLQY) of 9.85%. The orange luminescence with large Stokes shift (255 nm) and broad full width at half-maximum (fwhm = 147 nm) is derived from self-trapped excitons, and it is further evidenced by temperature-variable photoluminescence spectra. The PL decay spectrum shows the lifetime of Cs7Cd3Br13 is 1.26 μs. Finally, DFT calculation reveals that Cs7Cd3Br13 has a direct band gap with a value of 3.09 eV.

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Section: Resultsmentioning

confidence: 93%

All-Inorganic Luminescent Ternary Cadmium Halide Cs₇Cd₃Br₁₃ with Two Types of Cd-Centered Polyhedrons

Qiu

Dai

et al. 2022

Inorg. Chem.

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Screening Thermochromic Luminescent Materials in Cs‐Cd‐Br Ternary Phase Diagram for Temperature Visualization Applications

Liao,

Zhou,

Jin

et al. 2024

Laser & Photonics Reviews

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Thermochromic luminescent materials (TLMs) with spectral responsiveness to thermal stimuli have received broad attention due to the forefront applications in temperature visualization and sensing technologies. Herein, a phase diagram‐driven strategy for designing TLMs in Cs–Cd–Br ternary system is presented. The room temperature stable Cs7Cd3Br13 crystal is first obtained by utilizing a facile hydrothermal method, and the self‐trapped exciton (STE) luminescence is improved by breaking local symmetry via Mg2+ doping. Then thermochromic luminescence is further realized in Mn2+ co‐doped Cs7Cd3Br13 on the basis of reversible structural transition to metastable Cs2CdBr4 under thermal stimuli. The emission color change from bright yellow to green benefits from the variation of crystal fields around Mn2+, which can be switched by heating and cooling circulations. Finally, the resulting material is used as a demo to visualize the temperature of a homemade high‐frequency induction heating sintering platform.

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Water vapour induced instability of Cs2CdBr4 crystals

Cited by 2 publications

References 9 publications

All-Inorganic Luminescent Ternary Cadmium Halide Cs₇Cd₃Br₁₃ with Two Types of Cd-Centered Polyhedrons

All-Inorganic Luminescent Ternary Cadmium Halide Cs₇Cd₃Br₁₃ with Two Types of Cd-Centered Polyhedrons

Screening Thermochromic Luminescent Materials in Cs‐Cd‐Br Ternary Phase Diagram for Temperature Visualization Applications

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Water vapour induced instability of Cs2CdBr4 crystals

Cited by 2 publications

References 9 publications

All-Inorganic Luminescent Ternary Cadmium Halide Cs7Cd3Br13 with Two Types of Cd-Centered Polyhedrons

All-Inorganic Luminescent Ternary Cadmium Halide Cs7Cd3Br13 with Two Types of Cd-Centered Polyhedrons

Screening Thermochromic Luminescent Materials in Cs‐Cd‐Br Ternary Phase Diagram for Temperature Visualization Applications

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All-Inorganic Luminescent Ternary Cadmium Halide Cs₇Cd₃Br₁₃ with Two Types of Cd-Centered Polyhedrons

All-Inorganic Luminescent Ternary Cadmium Halide Cs₇Cd₃Br₁₃ with Two Types of Cd-Centered Polyhedrons