Cs2AgxNa1-xBiyIn1-yCl6 perovskites approaching photoluminescence quantum yields of 100%

Stroyuk O, Raievska O, Barabash A, Kupfer C, Osvet A, Dzhagan V, Zahn DRT, Hauch J, Brabec CJ (2022)

Publication Type: Journal article

Publication year: 2022

Journal

DOI: 10.1039/d2ma00737a

Abstract

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 mu s 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.

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Additional Organisation(s)

Involved external institutions

Forschungszentrum Jülich / Research Centre Jülich (FZJ) Germany (DE) National Academy of Sciences of Ukraine (NAN) / Національна академія наук України Ukraine (UA) Technische Universität Chemnitz Germany (DE)

How to cite

APA:

Stroyuk, O., Raievska, O., Barabash, A., Kupfer, C., Osvet, A., Dzhagan, V.,... Brabec, C.J. (2022). Cs2AgxNa1-xBiyIn1-yCl6 perovskites approaching photoluminescence quantum yields of 100%. Materials Advances. https://dx.doi.org/10.1039/d2ma00737a

MLA:

Stroyuk, Oleksandr, et al. "Cs2AgxNa1-xBiyIn1-yCl6 perovskites approaching photoluminescence quantum yields of 100%." Materials Advances (2022).

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