Anionic order and band gap engineering in vacancy ordered triple perovskites Electronic supplementary information (ESI) available. See DOI: 10.1039/c8cc09947b

被引：47

作者：

Hodgkins, Taylor L. ^{[1
]}

Savory, Christopher N. ^{[2
,4
]}

Bass, Kelsey K. ^{[1
]}

Seckman, Bethany L. ^{[1
]}

Scanlon, David O. ^{[2
,3
,4
]}

Djurovich, Peter I. ^{[1
]}

Thompson, Mark E. ^{[1
]}

Melot, Brent C. ^{[1
,4
]}

机构：

[1] Univ Southern Calif, Dept Chem, Los Angeles, CA 90089 USA

[2] UCL, Dept Chem, Christopher Ingold Bldg, London WC1H 0AJ, England

[3] Diamond Light Source Ltd, Diamond House,Harwell Sci & Innovat Campus, Didcot OX11 0DE, Oxon, England

[4] UCL, Thomas Young Ctr, Gower St, London WC1E 6BT, England

来源：

CHEMICAL COMMUNICATIONS | 2019年 / 55卷 / 21期

基金：

欧洲研究理事会; 英国工程与自然科学研究理事会;

关键词：

HIGH-EFFICIENCY; SOLAR; PERFORMANCE; COLORFUL;

D O I：

10.1039/c8cc09947b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We demonstrate that the optical absorption of the vacancy-ordered triple perovskite, Cs3Bi2Br9, can be significantly red-shifted by substituting Br with I while maintaining the layered structural topology. We also present evidence that Br ions prefer to occupy the bridging halide position within the layers in order to minimize strain within the lattice that results from the incorporation of the significantly larger iodide anions into the lattice. These results not only quantify the upper limit for I content in the layered polymorph, but also establish the minimum band gap obtainable from these Bi-based phases.

引用

页码：3164 / 3167

页数：4

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