Hybrid perovskite solar cells: In situ investigation of solution-processed PbI2 reveals metastable precursors and a pathway to producing porous thin films

Handle URI:
http://hdl.handle.net/10754/623438
Title:
Hybrid perovskite solar cells: In situ investigation of solution-processed PbI2 reveals metastable precursors and a pathway to producing porous thin films
Authors:
Barrit, Dounya; Sheikh, Arif D. ( 0000-0003-3823-0947 ) ; Munir, Rahim ( 0000-0002-6029-3760 ) ; Barbe, Jeremy ( 0000-0002-1204-4727 ) ; Li, Ruipeng; Smilgies, Detlef-M.; Amassian, Aram ( 0000-0002-5734-1194 )
Abstract:
The 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.
KAUST Department:
KAUST Solar Center (KSC); Physical Sciences and Engineering (PSE) Division
Citation:
Barrit 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.
Publisher:
Cambridge University Press (CUP)
Journal:
Journal of Materials Research
Issue Date:
17-Apr-2017
DOI:
10.1557/jmr.2017.117
Type:
Article
ISSN:
0884-2914; 2044-5326
Sponsors:
This 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.
Additional Links:
https://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
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; KAUST Solar Center (KSC)

Full metadata record

DC FieldValue Language
dc.contributor.authorBarrit, Dounyaen
dc.contributor.authorSheikh, Arif D.en
dc.contributor.authorMunir, Rahimen
dc.contributor.authorBarbe, Jeremyen
dc.contributor.authorLi, Ruipengen
dc.contributor.authorSmilgies, Detlef-M.en
dc.contributor.authorAmassian, Aramen
dc.date.accessioned2017-05-09T12:54:45Z-
dc.date.available2017-05-09T12:54:45Z-
dc.date.issued2017-04-17en
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.en
dc.identifier.issn0884-2914en
dc.identifier.issn2044-5326en
dc.identifier.doi10.1557/jmr.2017.117en
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.en
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.en
dc.publisherCambridge University Press (CUP)en
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/1B173FB59801ED8CE7D66F9216B29829en
dc.subjecthybrid perovskite solar cellsen
dc.subjectin situ grazing incidence wide angle X-ray scatteringen
dc.subjectlead iodideen
dc.subjectsolution processingen
dc.subjectsol–gelen
dc.subjecttwo-step conversionen
dc.titleHybrid perovskite solar cells: In situ investigation of solution-processed PbI2 reveals metastable precursors and a pathway to producing porous thin filmsen
dc.typeArticleen
dc.contributor.departmentKAUST Solar Center (KSC)en
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalJournal of Materials Researchen
dc.contributor.institutionCornell High Energy Synchrotron Source (CHESS), Cornell University, Ithaca, NY 14853, USAen
kaust.authorBarrit, Dounyaen
kaust.authorSheikh, Arif D.en
kaust.authorMunir, Rahimen
kaust.authorBarbe, Jeremyen
kaust.authorAmassian, Aramen
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