Mixed Group 14-15 Metalates as Model Compounds for Doped Lead Halide Perovskites

被引：13

作者：

Dehnhardt, Natalie ^{[1
,2
]}

Luy, Jan-Niclas ^{[3
]}

Klement, Philip ^{[4
,5
]}

Schipplick, Luca ^{[1
,2
]}

Chatterjee, Sangam ^{[4
,5
]}

Tonner, Ralf ^{[3
,6
]}

Heine, Johanna ^{[1
,2
]}

机构：

[1] Philipps Univ Marburg, Dept Chem, Hans Meerwein Str, D-35043 Marburg, Germany

[2] Philipps Univ Marburg, Mat Sci Ctr, Hans Meerwein Str, D-35043 Marburg, Germany

[3] Univ Regensburg, Fac Chem & Pharm, Univ Str 31, D-93053 Regensburg, Germany

[4] Justus Liebig Univ Giessen, Inst Expt Phys 1, Heinrich Buff Ring 16, D-35392 Giessen, Germany

[5] Justus Liebig Univ Giessen, Ctr Mat Res ZfM, Heinrich Buff Ring 16, D-35392 Giessen, Germany

[6] Univ Leipzig, Wilhelm Ostwald Inst Phys & Theoret Chem, Linnestr 2, D-04103 Leipzig, Germany

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2021年 / 60卷 / 08期

关键词：

antimony; bismuth; iodine; lead; perovskite; CRYSTAL-STRUCTURES; PERFORMANCE; BI; SUBSTITUTION; CHEMISTRY; MAPBI(3); CATIONS; BANDGAP; IMPACT;

D O I：

10.1002/anie.202014696

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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 Sb3+ and Bi3+ cations are still a matter of current investigation. Due to the different charge of the dopants compared to the constituting Pb2+ 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)PbE2I16 (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 PbI6 and EI6 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.

引用

页码：3906 / 3911

页数：6

共 70 条

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