Surface passivation of perovskite films via Iodide salt coatings for enhanced stability of organic lead halide perovskite solar cells
File(s)
Accepted version
Supporting information
Author(s)
Type
Journal Article
Abstract
Organic–inorganic halide perovskite materials have emerged as attractive alternatives to conventional solar cells, but device stability remains a concern. Recent research has demonstrated that the formation of superoxide species under exposure of the perovskite to light and oxygen leads to the degradation of CH3NH3PbI3 perovskites. In particular, it has been revealed that iodide vacancies in the perovskite are key sites in facilitating superoxide formation from oxygen. This paper shows that passivation of CH3NH3PbI3 films with an iodide salt, namely phenylethylammonium iodide (PhEtNH3I) can significantly enhance film and device stability under light and oxygen stress, without compromising power conversion efficiency. These observations are consistent with the iodide salt treatment reducing iodide vacancies and therefore lowers the yield of superoxide formation and improves stability. The present study elucidates a pathway to the future design and optimization of perovskite solar cells with greater stability.
Date Issued
2019-02-01
Date Acceptance
2018-11-07
Citation
Solar RRL, 2019, 3 (2), pp.1-9
ISSN
2367-198X
Publisher
Wiley
Start Page
1
End Page
9
Journal / Book Title
Solar RRL
Volume
3
Issue
2
Copyright Statement
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the accepted version of the following article: Bu, X., Westbrook, R.J.E., Lanzetta, L., Ding, D., Chotchuangchutchaval, T., Aristidou, N. and Haque, S.A. (2019), Surface Passivation of Perovskite Films via Iodide Salt Coatings for Enhanced Stability of Organic Lead Halide Perovskite Solar Cells. Sol. RRL, 3: 1800282, which has been published in final form at https://doi.org/10.1002/solr.201800282
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000459580400010&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Technology
Energy & Fuels
Materials Science, Multidisciplinary
Materials Science
iodide vacancies
perovskite solar cells
phenylethylammonium iodide
stability
superoxide
CH3NH3PBI3 PEROVSKITE
DEGRADATION
EFFICIENCY
HUMIDITY
LAYERS
LIGHT
Publication Status
Published
Article Number
ARTN 1800282
Date Publish Online
2018-12-27