Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/142035
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dc.contributor.authorHan, Guifangen_US
dc.contributor.authorKoh, Teck Mingen_US
dc.contributor.authorLim, Swee Sienen_US
dc.contributor.authorGoh, Teck Weeen_US
dc.contributor.authorGuo, Xintongen_US
dc.contributor.authorLeow, Shin Woeien_US
dc.contributor.authorBegum, Raihanaen_US
dc.contributor.authorSum, Tze Chienen_US
dc.contributor.authorMathews, Nripanen_US
dc.contributor.authorMhaisalkar, Subodh Gautamen_US
dc.date.accessioned2020-06-15T03:51:09Z-
dc.date.available2020-06-15T03:51:09Z-
dc.date.issued2017-
dc.identifier.citationHan, G., Koh, T. M., Lim, S. S., Goh, T. W., Guo, X., Leow, S. W., . . . Mhaisalkar, S. G. (2017). Facile method to reduce surface defects and trap densities in perovskite photovoltaics. ACS Applied Materials & Interfaces, 9(25), 21292-21297. doi:10.1021/acsami.7b05133en_US
dc.identifier.issn1944-8244en_US
dc.identifier.urihttps://hdl.handle.net/10356/142035-
dc.description.abstractOwing to improvements in film morphology, crystallization process optimization, and compositional design, the power conversion efficiency of perovskite solar cells has increased from 3.8 to 22.1% in a period of 5 years. Nearly defect-free crystalline films and slow recombination rates enable polycrystalline perovskite to boast efficiencies comparable to those of multicrystalline silicon solar cells. However, volatile low melting point components and antisolvent treatments essential for the processing of dense and smooth films often lead to surface defects that hamper charge extraction. In this study, we investigate methylammonium bromide (MABr) surface treatments on perovskite films to compensate for the loss of volatile cation during the annealing process for surface defect passivation, grain growth, and a bromide-rich top layer. This facile method did not change the phase or bandgap of perovskite films yet resulted in a significant increase in the open circuit voltages of devices. The devices with 10 mM MABr treatment show 2% improvement in absolute power conversion efficiency over the control sample.en_US
dc.description.sponsorshipNRF (Natl Research Foundation, S’pore)en_US
dc.description.sponsorshipMOE (Min. of Education, S’pore)en_US
dc.language.isoenen_US
dc.relation.ispartofACS Applied Materials & Interfacesen_US
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials & Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsami.7b05133en_US
dc.subjectEngineering::Materialsen_US
dc.titleFacile method to reduce surface defects and trap densities in perovskite photovoltaicsen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.contributor.schoolInterdisciplinary Graduate School (IGS)en_US
dc.contributor.researchEnergy Research Institute @ NTU (ERI@N)en_US
dc.contributor.researchResearch Techno Plazaen_US
dc.identifier.doi10.1021/acsami.7b05133-
dc.description.versionAccepted versionen_US
dc.identifier.pmid28574243-
dc.identifier.scopus2-s2.0-85021665001-
dc.identifier.issue25en_US
dc.identifier.volume9en_US
dc.identifier.spage21292en_US
dc.identifier.epage21297en_US
dc.subject.keywordsPerovskiteen_US
dc.subject.keywordsTrap Densityen_US
item.grantfulltextopen-
item.fulltextWith Fulltext-
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