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dc.contributor.authorBarrit, Dounya
dc.contributor.authorSheikh, Arif D.
dc.contributor.authorMunir, Rahim
dc.contributor.authorBarbe, Jeremy
dc.contributor.authorLi, Ruipeng
dc.contributor.authorSmilgies, Detlef-M.
dc.contributor.authorAmassian, Aram
dc.date.accessioned2017-05-09T12:54:45Z
dc.date.available2017-05-09T12:54:45Z
dc.date.issued2017-04-17
dc.identifier.citationBarrit D, Sheikh AD, Munir R, Barbé JM, Li R, et al. (2017) Hybrid perovskite solar cells: In situ investigation of solution-processed PbI2 reveals metastable precursors and a pathway to producing porous thin films. Journal of Materials Research: 1–9. Available: http://dx.doi.org/10.1557/jmr.2017.117.
dc.identifier.issn0884-2914
dc.identifier.issn2044-5326
dc.identifier.doi10.1557/jmr.2017.117
dc.identifier.urihttp://hdl.handle.net/10754/623438
dc.description.abstractThe successful and widely used two-step process of producing the hybrid organic-inorganic perovskite CH3NH3PbI3, consists of converting a solution deposited PbI2 film by reacting it with CH3NH3I. Here, we investigate the solidification of PbI2 films from a DMF solution by performing in situ grazing incidence wide angle X-ray scattering (GIWAXS) measurements. The measurements reveal an elaborate sol–gel process involving three PbI2⋅DMF solvate complexes—including disordered and ordered ones—prior to PbI2 formation. The ordered solvates appear to be metastable as they transform into the PbI2 phase in air within minutes without annealing. Morphological analysis of air-dried and annealed films reveals that the air-dried PbI2 is substantially more porous when the coating process produces one of the intermediate solvates, making this more suitable for subsequent conversion into the perovskite phase. The observation of metastable solvates on the pathway to PbI2 formation open up new opportunities for influencing the two-step conversion of metal halides into efficient light harvesting or emitting perovskite semiconductors.
dc.description.sponsorshipThis work was supported by the King Abdullah University of Science and Technology (KAUST). CHESS is supported by the NSF & NIH/NIGMS via NSF award DMR-1332208.
dc.publisherCambridge University Press (CUP)
dc.relation.urlhttps://www.cambridge.org/core/journals/journal-of-materials-research/article/hybrid-perovskite-solar-cells-in-situ-investigation-of-solutionprocessed-pbi2-reveals-metastable-precursors-and-a-pathway-to-producing-porous-thin-films/1B173FB59801ED8CE7D66F9216B29829
dc.subjecthybrid perovskite solar cells
dc.subjectin situ grazing incidence wide angle X-ray scattering
dc.subjectlead iodide
dc.subjectsolution processing
dc.subjectsol–gel
dc.subjecttwo-step conversion
dc.titleHybrid perovskite solar cells: In situ investigation of solution-processed PbI2 reveals metastable precursors and a pathway to producing porous thin films
dc.typeArticle
dc.contributor.departmentKAUST Solar Center (KSC)
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentOrganic Electronics and Photovoltaics Group
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalJournal of Materials Research
dc.contributor.institutionCornell High Energy Synchrotron Source (CHESS), Cornell University, Ithaca, NY 14853, USA
kaust.personBarrit, Dounya
kaust.personSheikh, Arif D.
kaust.personMunir, Rahim
kaust.personBarbe, Jeremy
kaust.personAmassian, Aram
dc.date.published-online2017-04-17
dc.date.published-print2017-05


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