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Stroyuk, Oleksandr L. [Author]; Raievska, Oleksandra [Author]; Barabash, Anastasia [Author]; Kupfer, Christian [Author]; Osvet, Andres [Author]; Dzhagan, Volodymyr [Author]; Zahn, Dietrich RT [Author]; Hauch, Jens [Author]; Brabec, Christoph [Author]

Cs2AgxNa1-xBiyIn1-yCl6 Perovskites Approaching Photoluminescence Quantum Yields of 100 %

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  • Media type: E-Article
  • Title: Cs2AgxNa1-xBiyIn1-yCl6 Perovskites Approaching Photoluminescence Quantum Yields of 100 %
  • Contributor: Stroyuk, Oleksandr L. [Author]; Raievska, Oleksandra [Author]; Barabash, Anastasia [Author]; Kupfer, Christian [Author]; Osvet, Andres [Author]; Dzhagan, Volodymyr [Author]; Zahn, Dietrich RT [Author]; Hauch, Jens [Author]; Brabec, Christoph [Author]
  • imprint: Royal Society of Chemistry, 2022
  • Published in: Materials advances 3(21), 7894-7903 (2022). doi:10.1039/D2MA00737A
  • Language: English
  • DOI: https://doi.org/10.1039/D2MA00737A
  • ISSN: 2633-5409
  • Origination:
  • Footnote: Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
  • Description: A new single-step and green approach for the synthesis of microcrystalline Cs2AgxNa1−xBiyIn1−yCl6 (CANBIC) perovskites in ambient conditions is introduced. The CANBIC powders emit broadband self-trapped excitonic photoluminescence (PL) with a champion PL quantum yield (QY) of 98 ± 2% and a PL lifetime of ca. 2 μs observed for x = 0.40 and y = 0.01–0.02. The study focuses on the dependence of structural, spectral, and photophysical properties of CANBICs on Bi content. CANBICs are solid solutions with isomorphous In-to-Bi substitution with the bandgap and valence band edge energy decreasing gradually with increasing y. The PL QY and the rate constant of the radiative recombination showed volcano-shaped dependences on the Bi content, while the rate of the non-radiative recombination revealed a drastic growth by three orders of magnitude as the Bi fraction y was elevated from 0.01 to 1.0 indicating that BiCl6 units are responsible for non-radiative recombination.
  • Access State: Open Access