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Multi-source vacuum deposition of methylammonium-free perovskite solar cells

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cam.issuedOnline2020-06-25
cam.orpheus.successMon Jul 06 08:36:59 BST 2020 - Embargo updated
dc.contributor.authorChiang, Yu-Hsien
dc.contributor.authorAnaya, Miguel
dc.contributor.authorStranks, Samuel D
dc.contributor.orcidStranks, Samuel [0000-0002-8303-7292]
dc.date.accessioned2020-06-30T23:30:37Z
dc.date.available2020-06-30T23:30:37Z
dc.date.issued2020-08-14
dc.description.abstractHalide perovskites of the form ABX3 have shown outstanding properties for solar cells. The highest reported compositions consist of mixtures of A-site cations methylammonium (MA), formamidinium (FA) and cesium and X-site iodide and bromide ions and are produced by solution processing. However, it is unclear whether solution processing will yield sufficient spatial performance uniformity for large-scale photovoltaic modules or compatibility with deposition of multi-layered tandem solar cell stacks. In addition, the volatile MA cation presents long-term stability issues. Here, we report the multi-source vacuum deposition of MA-free FA0.7Cs0.3Pb(I0.9Br0.1)3 perovskite thin films with high-quality morphological, structural and optoelectronic properties. We find that the controlled addition of excess PbI2 during the deposition is critical for achieving high performance and stability of the absorber material, and we fabricate p-i-n solar cells with stabilized power output of 18.2%. We also reveal the sensitivity of the deposition process to a range of parameters including substrate, annealing temperature, evaporation rates and source purity, providing a guide for further evaporation efforts. Our results demonstrate the enormous promise for MA-free perovskite solar cells employing industry-scalable multi-source evaporation processes.
dc.description.sponsorshipS.D.S. and M.A. acknowledge funding from the European Research Council (ERC) (grant agreement No. 756962 [HYPERION]) and the Marie Skłodowska-Curie actions (grant agreement No. 841386) under the European Union’s Horizon 2020 research and innovation programme. S.D.S acknowledges support from the Royal Society and Tata Group (UF150033). Y.-H. C. acknowledges funding from a Taiwan Cambridge Scholarship. Part of this work was undertaken using equipment facilities provided by the Henry Royce Institute, via the grant: Henry Royce Institute, Cambridge Equipment: EP/P024947/1. The authors acknowledge the Engineering and Physical Research Council (EPSRC) for funding (EP/R023980/1). We thank Tiarnan Doherty and Tim van de Goor for useful discussions.
dc.identifier.doi10.17863/CAM.54543
dc.identifier.eissn2380-8195
dc.identifier.issn2380-8195
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/307448
dc.languageen
dc.language.isoeng
dc.publisherAmerican Chemical Society (ACS)
dc.publisher.urlhttp://dx.doi.org/10.1021/acsenergylett.0c00839
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject3403 Macromolecular and Materials Chemistry
dc.subject34 Chemical Sciences
dc.subject3406 Physical Chemistry
dc.titleMulti-source vacuum deposition of methylammonium-free perovskite solar cells
dc.typeArticle
dcterms.dateAccepted2020-06-25
prism.numberacsenergylett.0c00839
prism.publicationNameACS Energy Letters
pubs.funder-project-idEuropean Research Council (756962)
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (841386)
pubs.funder-project-idRoyal Society (UF150033)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/P024947/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/R023980/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/P007767/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/S019367/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/R00661X/1)
rioxxterms.licenseref.startdate2020-06-25
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.typeJournal Article/Review
rioxxterms.versionVoR
rioxxterms.versionofrecord10.1021/acsenergylett.0c00839

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