Journal Article

FZJ-2022-03115

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Cs2AgxNa1-xBiyIn1-yCl6 Perovskites Approaching Photoluminescence Quantum Yields of 100 %

Stroyuk, O. L. (Corresponding author)FZJ* ; Raievska, O.FZJ* ; Barabash, A. ; Kupfer, C. ; Osvet, A. ; Dzhagan, V. ; Zahn, D. R. ; Hauch, J.FZJ* ; Brabec, C.FZJ*

2022
Royal Society of Chemistry Cambridge

This record in other databases:    

Please use a persistent id in citations: http://hdl.handle.net/2128/33251  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 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.

---

Contributing Institute(s):

1. Helmholtz-Institut Erlangen-Nürnberg Erneuerbare Energien (IEK-11)

Research Program(s):

1. 1212 - Materials and Interfaces (POF4-121) (POF4-121)

Appears in the scientific report 2022

---

Database coverage:
; ; ; ; Article Processing Charges ; Clarivate Analytics Master Journal List ; DOAJ Seal ; Emerging Sources Citation Index ; Fees ; SCOPUS ; Web of Science Core Collection

---