Selective deactivation of perovskite grain boundaries

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dc.contributor.authorAwais, Muhammad
dc.contributor.authorKundu, Soumya
dc.contributor.authorZhang, Dongyang
dc.contributor.authorYeddu, Vishal
dc.contributor.authorKokaba, Mohammad Reza
dc.contributor.authorAhmed, Yameen
dc.contributor.authorZhou, Wen
dc.contributor.authorDayneko, Sergey
dc.contributor.authorTan, Furui
dc.contributor.authorSaidaminov, Makhsud I.
dc.date.accessioned2024-01-23T23:14:38Z
dc.date.available2024-01-23T23:14:38Z
dc.date.copyright2023en_US
dc.date.issued2023
dc.description.abstractGrain boundaries in perovskites are a major source of degradation in perovskite solar cells. Here, we report selective passivation of perovskite grain boundaries with the aid of biphenyl-containing moieties. We find that biphenyl ligands selectively react with PbI2-rich interfaces but not with perovskite itself. Such targeted defect deactivation of grain boundaries leads to extended radiative recombination lifetime from 1 to 2.7 μs while allowing for efficient charge transfer from grains. The hydrophobic nature of benzene ring present in biphenyl improves the stability of perovskite in direct reaction with water by a factor of 3. The devices, all fabricated in ambient air, show significantly improved reproducibility (17%–21% efficiency) and increased open-circuit voltage of 1.11 V. This work offers a design principle for selective passivation of grain boundaries and chemical stabilization of hybrid structures.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipWe thank Solaires Entreprises Inc. and Canada’s Natural Sciences and Engineering Research Council (ALLRP 561355-20) for their financial support. M.I.S. is grateful to the NSERC (RGPIN-2020-04239), the Canada Research Chairs Program (CRC-2019-00297), the Canadian Foundation for Innovation (40326), and B.C. Knowledge Development Fund (806169) for operational and infrastructure support.en_US
dc.identifier.citationAwais, M., Kundu, S., Zhang, D., Yeddu, V., Kokaba, M. R., Ahmed, Y., ... Saidaminov, M. I. (2023). Selective deactivation of perovskite grain boundaries. Cell Reports Physical Science, 4(10), 101634. https://doi.org/10.1016/j.xcrp.2023.101634en_US
dc.identifier.urihttps://doi.org/10.1016/j.xcrp.2023.101634
dc.identifier.urihttp://hdl.handle.net/1828/15848
dc.language.isoenen_US
dc.publisherCell Reports Physical Scienceen_US
dc.subjectperovskite solar cells
dc.subjectsurface passivation
dc.subject4-phenylbenzylammonium iodide
dc.subjectbiphenyl methylammonium iodide
dc.subject.departmentDepartment of Electrical and Computer Engineering
dc.subject.departmentDepartment of Chemistry
dc.titleSelective deactivation of perovskite grain boundariesen_US
dc.typeArticleen_US

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