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 ISSN 2058-7546.

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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
Subjects:	Q Science > QC Physics Q Science > QE Geology
Divisions:	Faculty of Science, Engineering and Medicine > Science > Chemistry Faculty of Science, Engineering and Medicine > Science > Physics
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:	Date Event 21 November 2016 Available 1 October 2016 Accepted 16 May 2016 Submitted
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
Date of first compliant deposit:	22 November 2016
Date of first compliant Open Access:	21 June 2017
Funder:	Engineering and Physical Sciences Research Council (EPSRC)
Grant number:	EP/L505110/1, EP/N009096/1

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