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dc.contributor.authorFerrer Orri, Jordi
dc.contributor.authorDoherty, Tiarnan
dc.contributor.authorJohnstone, Duncan
dc.contributor.authorCollins, Sean
dc.contributor.authorSimons, Hugh
dc.contributor.authorMidgley, Paul A
dc.contributor.authorDucati, Caterina
dc.contributor.authorStranks, Samuel D
dc.date.accessioned2022-04-01T08:00:29Z
dc.date.available2022-04-01T08:00:29Z
dc.date.issued2022-05
dc.date.submitted2022-01-13
dc.identifier.issn0935-9648
dc.identifier.otheradma202200383
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/335657
dc.descriptionFunder: Engineering and Physical Sciences Research Council; Id: http://dx.doi.org/10.13039/501100000266
dc.descriptionFunder: National University of Ireland Travelling Studentship
dc.descriptionFunder: European Research Council; Id: http://dx.doi.org/10.13039/501100000781
dc.description.abstractThe interaction of high-energy electrons and X-ray photons with beam-sensitive semiconductors such as halide perovskites is essential for the characterisation and understanding of these optoelectronic materials. Using nano-probe diffraction techniques, which can investigate physical properties on the nanoscale, we perform studies of the interaction of electron and X-ray radiation with state-of-the-art (FA0.79MA0.16Cs0.05)Pb(I0.83Br0.17)3 hybrid halide perovskite films (FA, formamidinium; MA, methylammonium). We track the changes in the local crystal structure as a function of fluence using scanning electron diffraction and synchrotron nano X-ray diffraction techniques. We identify perovskite grains from which additional reflections, corresponding to PbBr2, appear as a crystalline degradation phase after fluences of ~200 e-Å-2. These changes are concomitant with the formation of small PbI2 crystallites at the adjacent high-angle grain boundaries, with the formation of pinholes, and with a phase transition from tetragonal to cubic. A similar degradation pathway is caused by photon irradiation in nano-X-ray diffraction, suggesting common underlying mechanisms. Our approach explores the radiation limits of these materials and provides a description of the degradation pathways on the nanoscale. Addressing high-angle grain boundaries will be critical for the further improvement of halide polycrystalline film stability, especially for applications vulnerable to high-energy radiation such as space photovoltaics.
dc.description.sponsorshipEP/L015978/1 HYPERION, grant agreement no. 756962 UF150033 EP/R023980/1 CAM-IES, EP/P007767/1 ePSIC (MG25250) Diamond Light Source (SP-20420)
dc.languageen
dc.publisherWiley
dc.subjectResearch Article
dc.subjectResearch Articles
dc.subjecthigh‐energy beam damage
dc.subjectlead halide perovskites
dc.subjectnano‐X‐ray diffraction
dc.subjectnanoprobe diffraction
dc.subjectscanning electron diffraction
dc.titleUnveiling the interaction mechanisms of electron and X-ray radiation with halide perovskite semiconductors using scanning nano-probe diffraction
dc.typeArticle
dc.date.updated2022-04-01T08:00:29Z
prism.publicationNameAdvanced Materials
dc.identifier.doi10.17863/CAM.83087
dcterms.dateAccepted2022-03-08
rioxxterms.versionofrecord10.1002/adma.202200383
rioxxterms.versionAO
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
dc.contributor.orcidFerrer Orri, Jordi [0000-0002-0432-5932]
dc.contributor.orcidMidgley, Paul [0000-0002-6817-458X]
dc.contributor.orcidDucati, Caterina [0000-0003-3366-6442]
dc.contributor.orcidStranks, Samuel [0000-0002-8303-7292]
dc.identifier.eissn1521-4095
pubs.funder-project-idEPSRC (2123952)
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-idLeverhulme Trust (RPG-2021-191)
pubs.funder-project-idEPSRC (Unknown)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/L015978/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/P007767/1)
cam.issuedOnline2022-03-14


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