Palgrave, R;
Perry, Robin;
Jia, X;
Liu, Yuhan;
Parkin, Ivan;
(2023)
Mixed valence Sn doped (CH3NH3)3Bi2Br9 produced by mechanochemical synthesis.
Physical Chemistry Chemical Physics
, 25
(6)
pp. 4563-4569.
10.1039/D2CP04487K.
Preview |
Text
d2cp04487k.pdf Download (1MB) | Preview |
Abstract
Bismuth halides with formula A3Bi2X9, where A is an inorganic or organic cation, show desirable properties as solar absorbers and luminescent materials. Control of structural and electronic dimensionality of these compounds is important to yield materials with good light absorption and charge transport. Here we report mechanochemical reaction of (CH3NH3)3Bi2Br9 with SnBr2 at room temperature in air, yielding a material with strong absorption across the visible region. We attribute this to mixed valence doping of Sn(II) and Sn(IV) on the Bi site. X-ray diffraction shows no secondary phases, even after heating at 200oC to improve crystallinity. X-ray photoelectron spectroscopy suggests the presence of Sn(II) and Sn(IV) states. A similar approach to dope Sn into the iodide analogue (CH3NH3)3Bi2I9 was unsuccessful.
| Type: | Article |
|---|---|
| Title: | Mixed valence Sn doped (CH3NH3)3Bi2Br9 produced by mechanochemical synthesis |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/D2CP04487K |
| Publisher version: | https://doi.org/10.1039/D2CP04487K |
| Language: | English |
| Additional information: | This article is licensed under a Creative Commons Attribution-Non Commercial 3.0 Unported Licence (http://creativecommons.org/licenses/by-nc/3.0/). |
| 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 > London Centre for Nanotechnology |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10159673 |
Archive Staff Only
 |
View Item |
