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- W4310791448 abstract "The effect of precursor ratios on the formation of Cs3Bi2Br9 via a re-precipitation synthesis method has been studied thoroughly. X-ray diffraction analysis showed that the precursor ratio was critical for the Cs3Bi2Br9 phase formation. The Cs-rich or Bi-rich precursor ratio resulted in diverse perovskite structure formation of Cs3BiBr6 and Cs3Bi2Br6 with micron size platelet and semi-micron size crystal morphology respectively. Unreacted BiBr3 precursor remains in the supernatant solution under Bi-rich conditions. The synthesized powder dispersed in toluene shows the degradation of the Cs3Bi2Br9 phase at Cs-rich conditions. Photoluminescence quantum yield (PLQY) of 0.73 % was identified in Cs3Bi2Br9 with a large contribution to the exciton-related recombination process. A precursor ratio CsBr:BiBr3 of 3.0:2.0 is proposed to form a single-phase Cs3Bi2Br9 structure, as the deviation in precursor ratio would promote the Cs3BiBr6 structure growth and affect the material’s optical performance." @default.
- W4310791448 created "2022-12-17" @default.
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- W4310791448 date "2023-02-01" @default.
- W4310791448 modified "2023-10-15" @default.
- W4310791448 title "Investigation of CsBr:BiBr3 precursor ratio concentration on cesium bismuth bromide perovskite formation" @default.
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- W4310791448 doi "https://doi.org/10.1016/j.chemphys.2022.111791" @default.
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