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dc.contributor.authorMela, Ioanna
dc.contributor.authorPoudel, Chetan
dc.contributor.authorAnaya, M
dc.contributor.authorDelport, G
dc.contributor.authorFrohna, Kyle
dc.contributor.authorMacpherson, Stuart
dc.contributor.authorDoherty, Tiarnan
dc.contributor.authorScheeder, A
dc.contributor.authorStranks, Samuel
dc.contributor.authorKaminski, Clemens
dc.date.accessioned2021-03-16T00:31:20Z
dc.date.available2021-03-16T00:31:20Z
dc.date.issued2021-06
dc.identifier.issn1616-301X
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/318820
dc.description.abstractHalide perovskites are a versatile class of semiconductors employed for high performance emerging optoelectronic devices, including flexoelectric systems, yet the influence of their ionic nature on their mechanical behaviour is still to be understood. Here, a combination of atomic-force, optical and compositional X-ray microscopy techniques is employed to shed light on the mechanical properties of halide perovskite films at the nanoscale. We reveal mechanical domains within and between morphological grains, enclosed by mechanical boundaries of higher Young's Modulus than the bulk parent material. These mechanical boundaries are associated with the presence of bromide-rich clusters as visualized by nano-X-ray fluorescence mapping. Stiffer regions are specifically selectively modified upon light soaking the sample, resulting in an overall homogenization of the mechanical properties towards the bulk Young's Modulus. We attribute this behaviour to light-induced ion migration processes that homogenize the local chemical distribution, which is accompanied by photobrightening of the photoluminescence within the same region. Our work highlights critical links between mechanical, chemical and optoelectronic characteristics in this family of perovskites, and demonstrates the potential of combinational imaging studies to understand and design halide perovskite films for emerging applications such as photoflexoelectricity.
dc.publisherWiley
dc.rightsAttribution 4.0 International (CC BY)
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleRevealing Nanomechanical Domains and Their Transient Behavior in Mixed-Halide Perovskite Films
dc.typeArticle
prism.issueIdentifier23
prism.publicationDate2021
prism.publicationNameAdvanced Functional Materials
prism.volume31
dc.identifier.doi10.17863/CAM.65938
dcterms.dateAccepted2021-03-12
rioxxterms.versionofrecord10.1002/adfm.202100293
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2021-06-01
dc.contributor.orcidMela, Ioanna [0000-0002-2914-9971]
dc.contributor.orcidPoudel, Chetan [0000-0002-8512-9238]
dc.contributor.orcidAnaya, M [0000-0002-0384-5338]
dc.contributor.orcidDelport, G [0000-0003-3882-2782]
dc.contributor.orcidFrohna, Kyle [0000-0002-2259-6154]
dc.contributor.orcidMacpherson, Stuart [0000-0003-3758-1198]
dc.contributor.orcidDoherty, Tiarnan [0000-0003-1150-4012]
dc.contributor.orcidStranks, Samuel [0000-0002-8303-7292]
dc.contributor.orcidKaminski, Clemens [0000-0002-5194-0962]
dc.identifier.eissn1616-3028
rioxxterms.typeJournal Article/Review
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (722380)
pubs.funder-project-idRoyal Society (UF150033)
pubs.funder-project-idEuropean Research Council (756962)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/R023980/1)
pubs.funder-project-idRoyal Society (NF170533)
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (841386)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/H018301/1)
pubs.funder-project-idWellcome Trust (089703/Z/09/Z)
pubs.funder-project-idMedical Research Council (MR/K015850/1)
pubs.funder-project-idMedical Research Council (MR/K02292X/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/L015889/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/S022953/1)
cam.issuedOnline2021-03-31
cam.orpheus.successMon Aug 16 07:32:04 BST 2021 - The item has an open VoR version.
cam.orpheus.counter21
rioxxterms.freetoread.startdate2100-01-01


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