Show simple item record

dc.contributor.authorSarmah, Smritakshi P.
dc.contributor.authorBurlakov, Victor M.
dc.contributor.authorYengel, Emre
dc.contributor.authorBanavoth, Murali
dc.contributor.authorAlarousu, Erkki
dc.contributor.authorEl-Zohry, Ahmed M.
dc.contributor.authorYang, Chen
dc.contributor.authorAlias, Mohd Sharizal
dc.contributor.authorZhumekenov, Ayan A.
dc.contributor.authorSaidaminov, Makhsud I.
dc.contributor.authorCho, Nam Chul
dc.contributor.authorWehbe, Nimer
dc.contributor.authorMitra, Somak
dc.contributor.authorAjia, Idris A.
dc.contributor.authorDey, Sukumar
dc.contributor.authorMansour, Ahmed
dc.contributor.authorAbdelsamie, Maged
dc.contributor.authorAmassian, Aram
dc.contributor.authorRoqan, Iman S.
dc.contributor.authorOoi, Boon S.
dc.contributor.authorGoriely, Alain
dc.contributor.authorBakr, Osman
dc.contributor.authorMohammed, Omar F.
dc.date.accessioned2017-05-31T11:23:07Z
dc.date.available2017-05-31T11:23:07Z
dc.date.issued2017-02-07
dc.identifier.citationSarmah SP, Burlakov VM, Yengel E, Murali B, Alarousu E, et al. (2017) Double Charged Surface Layers in Lead Halide Perovskite Crystals. Nano Letters 17: 2021–2027. Available: http://dx.doi.org/10.1021/acs.nanolett.7b00031.
dc.identifier.issn1530-6984
dc.identifier.issn1530-6992
dc.identifier.doi10.1021/acs.nanolett.7b00031
dc.identifier.urihttp://hdl.handle.net/10754/623824
dc.description.abstractUnderstanding defect chemistry, particularly ion migration, and its significant effect on the surface’s optical and electronic properties is one of the major challenges impeding the development of hybrid perovskite-based devices. Here, using both experimental and theoretical approaches, we demonstrated that the surface layers of the perovskite crystals may acquire a high concentration of positively charged vacancies with the complementary negatively charged halide ions pushed to the surface. This charge separation near the surface generates an electric field that can induce an increase of optical band gap in the surface layers relative to the bulk. We found that the charge separation, electric field, and the amplitude of shift in the bandgap strongly depend on the halides and organic moieties of perovskite crystals. Our findings reveal the peculiarity of surface effects that are currently limiting the applications of perovskite crystals and more importantly explain their origins, thus enabling viable surface passivation strategies to remediate them.
dc.description.sponsorshipKing Abdullah University of Science and Technology (KAUST) supported the work reported here. The authors gratefully acknowledge funding support from KACST, Technology Innovation Center for Solid-State Lighting at KAUST.
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttp://pubs.acs.org/doi/abs/10.1021/acs.nanolett.7b00031
dc.subjectdefects
dc.subjection migration
dc.subjectlead halide perovskite crystal
dc.subjectNanometer surface layers
dc.subjectone vs two-photon excitation
dc.titleDouble Charged Surface Layers in Lead Halide Perovskite Crystals
dc.typeArticle
dc.contributor.departmentChemical Science Program
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentElectrical Engineering Program
dc.contributor.departmentFunctional Nanomaterials Lab (FuNL)
dc.contributor.departmentImaging and Characterization Core Lab
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentOrganic Electronics and Photovoltaics Group
dc.contributor.departmentPhotonics Laboratory
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentSemiconductor and Material Spectroscopy (SMS) Laboratory
dc.contributor.departmentSurface Science
dc.contributor.departmentUltrafast Laser Spectroscopy and Four-dimensional Electron Imaging Research Group
dc.identifier.journalNano Letters
dc.contributor.institutionMathematical Institute, University of Oxford, Woodstock Road, Oxford, OX2 6GG, , United Kingdom
dc.contributor.institutionSchool of Chemistry, University of Hyderabad, Hyderabad, 500046, , India
dc.contributor.institutionDepartment of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, M5S 3G4, , Canada
kaust.personSarmah, Smritakshi P.
kaust.personYengel, Emre
kaust.personBanavoth, Murali
kaust.personAlarousu, Erkki
kaust.personEl-Zohry, Ahmed
kaust.personYang, Chen
kaust.personAlias, Mohd Sharizal
kaust.personZhumekenov, Ayan A.
kaust.personSaidaminov, Makhsud I.
kaust.personCho, Nam Chul
kaust.personWehbe, Nimer
kaust.personMitra, Somak
kaust.personAjia, Idris A.
kaust.personDey, Sukumar
kaust.personMansour, Ahmed
kaust.personAbdelsamie, Maged
kaust.personAmassian, Aram
kaust.personRoqan, Iman S.
kaust.personOoi, Boon S.
kaust.personBakr, Osman M.
kaust.personMohammed, Omar F.
dc.date.published-online2017-02-07
dc.date.published-print2017-03-08


This item appears in the following Collection(s)

Show simple item record