Hauptseite > Publikationsdatenbank > Exploring compositional versatility of perovskite-like Cs 3 (Bi,Sb) 2 X 9 (X = Cl, Br, I) compounds by high-throughput experimentation > print

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005     20250804115200.0
024 7 _ |a 10.1039/D5MA00479A
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082 _ _ |a 540
100 1 _ |a Stroyuk, Oleksandr
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245 _ _ |a Exploring compositional versatility of perovskite-like Cs 3 (Bi,Sb) 2 X 9 (X = Cl, Br, I) compounds by high-throughput experimentation
260 _ _ |a Cambridge
|c 2025
|b Royal Society of Chemistry
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520 _ _ |a A high-throughput compositional screening of perovskite-like Cs3M2X9 double salts (M = Bi and Sb and X = Cl, Br, and I) allows independent variation of the M and X components, yielding one hundred single-phase products within a general synthetic approach that combines engineered precipitation of chloride and bromide precursors and their anion exchange conversion into more complex halide derivatives. The X variation at a fixed M = Bi3+ yields various single-phase Cs3Bi2X9 compounds with X = Cl, Cl + Br, Br, Br + I, and Cl + Br + I. The anion exchange in chlorides with Br + I combinations produces stable Cs3Bi2X9 compounds with all three halides simultaneously present in the lattice, and Cl, Br, and I contents varied in the ranges of ca. 40–90%, 10–60%, and 30–90%, respectively. The presence of bromide, even as a residue, enables the co-existence of Cl and I, and dictates the trigonal symmetry, in contrast to the hexagonal symmetry typical for Cs3M2I9. The compounds with X = Cl + Br + I show band gap variations in the range of 2.0–2.5 eV and linear dependencies on the iodide content and lattice parameters. The simultaneous variation of the X and M sites yields single-phase Cs3(Bi,Sb)2X9 solid-solution compounds with tailorable X and a Bi/Sb ratio varied from 0 to 1.0. All Bi/Sb families reveal a band bowing effect, with the band gaps of mixed Bi/Sb compounds being lower than those of Bi- and Sb-only counterparts. The bowing parameter depends on the X subsystem, decreasing from 0.80 eV for Cl to 0.60 eV for Cl + Br and 0.40–0.45 eV for Br and Br + I, indicating that chemical variations in the mixed Bi/Sb lattices, rather than local disorders or lattice strains, govern the band-bowing behavior.
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700 1 _ |a Raievska, Oleksandra
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700 1 _ |a Kinge, Sachin
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700 1 _ |a Hauch, Jens
|0 P:(DE-Juel1)177626
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700 1 _ |a Brabec, Christoph
|0 P:(DE-Juel1)176427
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773 _ _ |a 10.1039/D5MA00479A
|g Vol. 6, no. 14, p. 4847 - 4856
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|t Materials advances
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|y 2025
|x 2633-5409
856 4 _ |u https://juser.fz-juelich.de/record/1044610/files/d5ma00479a.pdf
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