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dc.contributor.authorRoose, Bart
dc.date.accessioned2022-05-17T09:03:24Z
dc.date.available2022-05-17T09:03:24Z
dc.date.issued2021-03-25
dc.identifier.issn2046-2069
dc.identifier.other35423767
dc.identifier.otherPMC8696990
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/337227
dc.description.abstractPerovskite solar cells have rapidly become the most promising emerging photovoltaic technology. This is largely due to excellent self-passivating properties of the perovskite absorber material, allowing for a remarkable ease of fabrication. However, the field is plagued by poor reproducibility and conflicting results. This study finds that dynamic processes (ion migration) taking place after fabrication (without external stimuli) have a large influence on materials properties and need to be controlled to achieve reproducible results. The morphological and optoelectronic properties of triple cation perovskites with varying halide ratios are studied as they evolve over time. It is found that ion migration is essential for self-passivation, but can be impeded by low ion mobility or a low number of mobile species. Restricted ion movement can lead to crack formation in strained films, with disastrous consequences for device performance. However, a short light soaking treatment after fabrication helps to mobilize ions and achieve self-passivation regardless of composition. The community should adopt this treatment as standard practice to increase device performance and reproducibility.
dc.languageeng
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.sourcenlmid: 101581657
dc.sourceessn: 2046-2069
dc.titleIon migration drives self-passivation in perovskite solar cells and is enhanced by light soaking.
dc.typeArticle
dc.date.updated2022-05-17T09:03:24Z
prism.endingPage12101
prism.issueIdentifier20
prism.publicationNameRSC advances
prism.startingPage12095
prism.volume11
dc.identifier.doi10.17863/CAM.84645
rioxxterms.versionofrecord10.1039/d1ra01166a
rioxxterms.versionVoR
rioxxterms.licenseref.urihttps://creativecommons.org/licenses/by/4.0/
dc.contributor.orcidRoose, Bart [0000-0002-0972-1475]


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Attribution 4.0 International
Except where otherwise noted, this item's licence is described as Attribution 4.0 International