Hodgkins, TL;
Savory, CN;
Bass, KK;
Seckman, BL;
Scanlon, DO;
Djurovich, PI;
Thompson, ME;
(2019)
Anionic order and band gap engineering in vacancy ordered triple perovskites.
Chemical Communications
, 55
(21)
pp. 3164-3167.
10.1039/c8cc09947b.
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Abstract
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.
| Type: | Article |
|---|---|
| Title: | Anionic order and band gap engineering in vacancy ordered triple perovskites |
| Location: | England |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/c8cc09947b |
| Publisher version: | https://doi.org/10.1039/c8cc09947b |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10070847 |
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