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Enhanced stability and efficiency in hole-transport-layer-free CsSnI3 perovskite photovoltaics
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Marshall, Kenneth P., Walker, Marc, Walton, Richard I. and Hatton, Ross A. (2016) Enhanced stability and efficiency in hole-transport-layer-free CsSnI3 perovskite photovoltaics. Nature Energy, 1 . 16178. doi:10.1038/NENERGY.2016.178
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Official URL: http://dx.doi.org/10.1038/nenergy.2016.178
Abstract
Photovoltaics based on tin halide perovskites have not yet benefitted from the same intensive research effort that has propelled lead perovskite photovoltaics to >20% power conversion efficiency, due to the susceptibility of tin perovskites to oxidation, the low energy of defect formation and the difficultly in forming pin-hole free films. Here we report CsSnI3 perovskite photovoltaic devices without a hole-selective interfacial layer that exhibit a stability 10 times greater than devices with the same architecture using methylammonium lead iodide perovskite, and the highest efficiency to date for a CsSnI3 photovoltaic: 3.56%. The latter results in large part from a high device fill-factor, achieved using a strategy that removes the need for an electron blocking layer or an additional processing step to minimise the pinhole density in the perovskite film, based on co-depositing the perovskite precursors with SnCl2. These two findings raise the prospect that this class of lead-free perovskite photovoltaic may yet prove viable for applications.
| Item Type: | Journal Article | ||||||||
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| Subjects: | Q Science > QC Physics Q Science > QE Geology |
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| Divisions: | Faculty of Science > Chemistry Faculty of Science > Physics |
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| Library of Congress Subject Headings (LCSH): | Perovskite, Photovoltaic cells | ||||||||
| Journal or Publication Title: | Nature Energy | ||||||||
| Publisher: | Nature Publishing Group | ||||||||
| ISSN: | 2058-7546 | ||||||||
| Official Date: | 21 November 2016 | ||||||||
| Dates: |
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| Date of first compliant deposit: | 22 November 2016 | ||||||||
| Volume: | 1 | ||||||||
| Article Number: | 16178 | ||||||||
| DOI: | 10.1038/NENERGY.2016.178 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| Funder: | Engineering and Physical Sciences Research Council (EPSRC) | ||||||||
| Grant number: | EP/L505110/1, EP/N009096/1 |
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