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Stabilizing lead-free all-inorganic tin halide perovskites by ion exchange
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Jiang, Junke, Onwudinanti, Chidozie K., Hatton, Ross A., Bobbert, Peter A. and Tao, Shuxia (2018) Stabilizing lead-free all-inorganic tin halide perovskites by ion exchange. Journal of Physical Chemistry C, 122 (31). pp. 17660-17667. doi:10.1021/acs.jpcc.8b04013 ISSN 1932-7447.
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Official URL: https://doi.org/10.1021/acs.jpcc.8b04013
Abstract
Because of its thermal stability, lead-free composition, and nearly ideal optical and electronic properties, the orthorhombic CsSnI3 perovskite is considered promising as a light absorber for lead-free all-inorganic perovskite solar cells. However, the susceptibility of this three-dimensional perovskite toward oxidation in air has limited the development of solar cells based on this material. Here, we report the findings of a computational study which identifies promising Rb y Cs1-y Sn(Br x I1-x )3 perovskites for solar cell applications, prepared by substituting cations (Rb for Cs) and anions (Br for I) in CsSnI3. We show the evolution of the material electronic structure as well as its thermal and structural stabilities upon gradual substitution. Importantly, we demonstrate how the unwanted yellow phase can be suppressed by substituting Br for I in CsSn(Br x I1-x )3 with x ≥ 1/3. We predict that substitution of Rb for Cs results in a highly homogeneous solid solution and therefore an improved film quality and applicability in solar cell devices.
| Item Type: | Journal Article | ||||||||
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||||||
| SWORD Depositor: | Library Publications Router | ||||||||
| Journal or Publication Title: | Journal of Physical Chemistry C | ||||||||
| Publisher: | American Chemical Society | ||||||||
| ISSN: | 1932-7447 | ||||||||
| Official Date: | 9 August 2018 | ||||||||
| Dates: |
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| Volume: | 122 | ||||||||
| Number: | 31 | ||||||||
| Page Range: | pp. 17660-17667 | ||||||||
| DOI: | 10.1021/acs.jpcc.8b04013 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||
| Date of first compliant deposit: | 25 September 2018 | ||||||||
| Date of first compliant Open Access: | 16 January 2019 |
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