In:
Angewandte Chemie International Edition, Wiley, Vol. 60, No. 8 ( 2021-02-19), p. 3906-3911
Abstract:
Doping and alloying are valuable tools for modifying and enhancing the properties and performance of lead halide perovskites. However, the effects of heterovalent doping with Sb 3+ and Bi 3+ cations are still a matter of current investigation. Due to the different charge of the dopants compared to the constituting Pb 2+ ions, a simultaneous creation of defects is unavoidable and the influence of these defects and the actual metal substitution become entangled. Herein, we present the first 14–15 iodido metalates, (BED) 4 PbE 2 I 16 (BED=N‐benzylethylenediammonium; E=Sb ( 1 ), Bi ( 2 )), which are model compounds for doped lead iodide perovskites and display surprisingly low band gaps of 2.01 ( 1 ) and 1.88 eV ( 2 ). Quantum chemical investigations show that this stems from a good electronic match between the PbI 6 and EI 6 units of the compounds. Our results provide a model system for doped perovskites, but also represent the first examples of a promising new class of metal halide materials.
Type of Medium:
Online Resource
ISSN:
1433-7851
,
1521-3773
DOI:
10.1002/anie.202014696
Language:
English
Publisher:
Wiley
Publication Date:
2021
detail.hit.zdb_id:
2011836-3
detail.hit.zdb_id:
123227-7
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