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Efficient and stable wide bandgap perovskite solar cells through surface passivation with long alkyl chain organic cations

Duong, The; Pham, Huyen T.; Yin, Yanting; Peng, Jun; Mahmud, Md Arafat; Wu, Yiliang; Shen, Heping; Zheng, Jianghui; Tran, Phu Thanh; Lu, Teng; Li, Li; Kumar, Anand; Andersson, Gunther; Ho-Baillie, Anita; Liu, Yun; White, Thomas; Weber, Klaus; Catchpole, Kylie

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Defects on perovskite surfaces acting as charge-carrier-traps are a key factor limiting the performance of perovskite solar cells (PSCs). Here we studied the defect passivation effect of three bromide-containing alkylammonium organic cations with increasing alkyl-chain-length: n-butylammonium bromide, n-octylammonium bromide and n-dodecylammonium bromide on a perovskite composition with 1.72 eV bandgap. Long-alkyl-chain organic cations were found to have a greater passivation effect compared to...[Show more]

dc.contributor.authorDuong, The
dc.contributor.authorPham, Huyen T.
dc.contributor.authorYin, Yanting
dc.contributor.authorPeng, Jun
dc.contributor.authorMahmud, Md Arafat
dc.contributor.authorWu, Yiliang
dc.contributor.authorShen, Heping
dc.contributor.authorZheng, Jianghui
dc.contributor.authorTran, Phu Thanh
dc.contributor.authorLu, Teng
dc.contributor.authorLi, Li
dc.contributor.authorKumar, Anand
dc.contributor.authorAndersson, Gunther
dc.contributor.authorHo-Baillie, Anita
dc.contributor.authorLiu, Yun
dc.contributor.authorWhite, Thomas
dc.contributor.authorWeber, Klaus
dc.contributor.authorCatchpole, Kylie
dc.date.accessioned2021-11-16T04:14:46Z
dc.identifier.issn2050-7488
dc.identifier.urihttp://hdl.handle.net/1885/251844
dc.description.abstractDefects on perovskite surfaces acting as charge-carrier-traps are a key factor limiting the performance of perovskite solar cells (PSCs). Here we studied the defect passivation effect of three bromide-containing alkylammonium organic cations with increasing alkyl-chain-length: n-butylammonium bromide, n-octylammonium bromide and n-dodecylammonium bromide on a perovskite composition with 1.72 eV bandgap. Long-alkyl-chain organic cations were found to have a greater passivation effect compared to their shorter counterparts due to greater reduction in surface defects and substantial changes in the electronic structure of the passivated perovskite films. The efficiency of 1.72 eV PSCs was improved to 19.1% with an excellent open-circuit-voltage of over 1280 mV. The long-alkyl-chain passivation significantly improved the moisture and light stability of PSCs as the unencapsulated devices retained >90% of the initial performance after 144 h at 70–85% relative-humidity and >93% of the initial performance after operating under light for 80 h. The study has paved the way for efficient and stable wide bandgap perovskite top cells used in perovskite-silicon tandem solar cells.
dc.description.sponsorshipThis work has been supported by the Australian Government through the Australian Renewable Energy Agency (ARENA). T. D. and J. Z. acknowledges the financial support of Postdoc Fellowships from the Australian Centre for Advanced Photovoltaics (ACAP). T. W. is the recipient of an Australian Research Council Future Fellowship (project number FT180100302) funded by the Australian Government.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherRoyal Society of Chemistry
dc.rights© 2021 The Royal Society of Chemistry
dc.sourceJournal of Materials Chemistry A
dc.subjectPerovskite
dc.subjectSolar cells
dc.subjectTandem solar cell
dc.subjectDefect passivation
dc.titleEfficient and stable wide bandgap perovskite solar cells through surface passivation with long alkyl chain organic cations
dc.typeJournal article
local.identifier.citationvolume9
dcterms.dateAccepted2021-08-15
dc.date.issued2021-08-16
local.publisher.urlhttps://pubs.rsc.org/
local.type.statusAccepted Version
local.contributor.affiliationDuong, The, School of Engineering, The Australian National University
local.contributor.affiliationPham, Huyen, Department of Electronic Materials Engineering, The Australian National University
local.contributor.affiliationYin, Yanting, Flinders University
local.contributor.affiliationPeng, Jun, School of Engineering, The Australian National University
local.contributor.affiliationMahmud, Md Arafat, School of Engineering, The Australian National University
local.contributor.affiliationWu, YiLiang, School of Engineering, The Australian National University
local.contributor.affiliationShen, Heping, School of Engineering, The Australian National University
local.contributor.affiliationZheng, Jianghui, The University of Sydney
local.contributor.affiliationTran-Phu, Thanh, Nanotechnology Research Laboratory, The Australian National University
local.contributor.affiliationLu, Teng, Research School of Chemistry, The Australian National University
local.contributor.affiliationLi, Li, Department of Electronic Materials Engineering, The Australian National University
local.contributor.affiliationKumar, Anand, Flinders University
local.contributor.affiliationAndersson, Gunther G., Flinders University
local.contributor.affiliationHo-Baillie, Anita, The University of Sydney
local.contributor.affiliationLiu, Yun, Research School of Chemistry, The Australian National University
local.contributor.affiliationWhite, Thomas, School of Engineering, The Australian National University
local.contributor.affiliationWeber, Klaus, School of Engineering, The Australian National University
local.contributor.affiliationCatchpole, Kylie, School of Engineering, The Australian National University
local.description.embargo2022-08-16
dc.relationhttp://purl.org/au-research/grants/arc/FT180100302
local.bibliographicCitation.issue34
local.bibliographicCitation.startpage18454
local.bibliographicCitation.lastpage18465
local.identifier.doi10.1039/D1TA05699A
dcterms.accessRightsOpen Access after embargo ends
dc.provenancehttps://v2.sherpa.ac.uk/id/publication/25611..."Author Accepted Manuscript can be made open access on non-commercial repository after 12 month embargo" from SHERPA/RoMEO site (as at 16.11.2021).
CollectionsANU Research Publications

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