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Article Dans Une Revue Optical Materials Année : 2024

Zinc-alloyed cesium manganese halides achieved through an optimized precipitation strategy

Résumé

Lead halide perovskites have attracted huge interest for their tremendous optical properties. However, their development is limited by lead toxicity and by an insufficient stability. We proposed recently a simple, new antisolvent precipitation route to achieve zinc-doped perovskite-inspired manganese halides with a formula Cs3ZnxMn1-xBr5. In the present paper, the influence of the atomic ratio R introduced during the synthesis, with , on the structure, morphology and optical properties of the material is investigated. Higher phase purity and best optical performances were obtained for the stoichiometric ratio, R 3. It was shown that when R is inferior to 3, the presence of two by-products, platelet-like Cs2ZnxMn1-xBr4 and of Cs2MnBr4.2H2O, is evidenced along with a lower internal quantum yield (iQY). Results show that adding a washing step with a polar solvent increases the iQY under blue excitation from 41 to 59 %. This has been correlated with a preferential dissolution of above-mentioned impurities and with an improvement in the material crystallinity.

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Chimie
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Dates et versions

hal-04622295 , version 1 (24-06-2024)

Identifiants

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Pierre Martin, Audrey Potdevin, Geneviève Chadeyron, François Réveret, Damien Boyer. Zinc-alloyed cesium manganese halides achieved through an optimized precipitation strategy. Optical Materials, 2024, 154, pp.115549. ⟨10.1016/j.optmat.2024.115549⟩. ⟨hal-04622295⟩
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