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dc.contributor.authorAbdi-Jalebi, Mojtaba
dc.contributor.authorAndaji-Garmaroudi, Zahra
dc.contributor.authorPearson, Andrew J
dc.contributor.authorDivitini, Giorgio
dc.contributor.authorCacovich, Stefania
dc.contributor.authorPhilippe, Bertrand
dc.contributor.authorRensmo, Håkan
dc.contributor.authorDucati, Caterina
dc.contributor.authorFriend, Richard
dc.contributor.authorStranks, Samuel
dc.date.accessioned2018-10-08T13:55:06Z
dc.date.available2018-10-08T13:55:06Z
dc.date.issued2018-11-09
dc.identifier.issn2380-8195
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/283234
dc.description.abstractHalide perovskites passivated with potassium or rubidium show superior photovoltaic device performance compared to unpassivated samples. However, it is unclear which passivation route is more effective for film stability. Here, we directly compare the optoelectronic properties and stability of thin films when passivating triple-cation perovskite films with potassium or rubidium species. The optoelectronic and chemical studies reveal that the alloyed perovskites are tolerant toward higher loadings of potassium than rubidium. Whereas potassium complexes with bromide from the perovskite precursor solution to form thin surface passivation layers, rubidium additives favor the formation of phase-segregated micron-sized rubidium halide crystals. This tolerance to higher loadings of potassium allows us to achieve superior luminescent properties with potassium passivation. We also find that exposure to a humid atmosphere drives phase segregation and grain coalescence for all compositions, with the rubidium-passivated sample showing the highest sensitivity to nonperovskite phase formation. Our work highlights the benefits but also the limitations of these passivation approaches in maximizing both optoelectronic properties and the stability of perovskite films.
dc.description.sponsorshipEngineering and Physical Sciences Research Council (grant number: EP/M005143/1)
dc.format.mediumPrint-Electronic
dc.languageeng
dc.publisherAmerican Chemical Society (ACS)
dc.titlePotassium- and Rubidium-Passivated Alloyed Perovskite Films: Optoelectronic Properties and Moisture Stability.
dc.typeArticle
prism.endingPage2678
prism.issueIdentifier11
prism.publicationDate2018
prism.publicationNameACS Energy Lett
prism.startingPage2671
prism.volume3
dc.identifier.doi10.17863/CAM.30599
dcterms.dateAccepted2018-09-28
rioxxterms.versionofrecord10.1021/acsenergylett.8b01504
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2018-11
dc.contributor.orcidDivitini, Giorgio [0000-0003-2775-610X]
dc.contributor.orcidDucati, Caterina [0000-0003-3366-6442]
dc.contributor.orcidFriend, Richard [0000-0001-6565-6308]
dc.contributor.orcidStranks, Samuel [0000-0002-8303-7292]
dc.identifier.eissn2380-8195
rioxxterms.typeJournal Article/Review
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/M005143/1)
pubs.funder-project-idLloyd's Register Foundation (via University of Southampton) (unknown)
pubs.funder-project-idEuropean Research Council (756962)
cam.issuedOnline2018-09-28
rioxxterms.freetoread.startdate2019-09-28


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