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dc.contributor.authorWei, Mingyang
dc.contributor.authorXiao, Ke
dc.contributor.authorWalters, Grant
dc.contributor.authorLin, Renxing
dc.contributor.authorZhao, Yongbiao
dc.contributor.authorSaidaminov, Makhsud I.
dc.contributor.authorTodorović, Petar
dc.contributor.authorJohnston, Andrew
dc.contributor.authorHuang, Ziru
dc.contributor.authorChen, Haijie
dc.contributor.authorLi, Aidong
dc.contributor.authorZhu, Jia
dc.contributor.authorYang, Zhenyu
dc.contributor.authorWang, Ya-Kun
dc.contributor.authorProppe, Andrew H.
dc.contributor.authorKelley, Shana O.
dc.contributor.authorHou, Yi
dc.contributor.authorVoznyy, Oleksandr
dc.contributor.authorTan, Hairen
dc.contributor.authorSargent, E.
dc.date.accessioned2021-02-07T07:54:17Z
dc.date.available2021-02-07T07:54:17Z
dc.date.issued2020-03
dc.identifier.citationWei, M., Xiao, K., Walters, G., Lin, R., Zhao, Y., Saidaminov, M. I., … Sargent, E. H. (2020). Combining Efficiency and Stability in Mixed Tin–Lead Perovskite Solar Cells by Capping Grains with an Ultrathin 2D Layer. Advanced Materials, 32(12), 1907058. doi:10.1002/adma.201907058
dc.identifier.issn0935-9648
dc.identifier.issn1521-4095
dc.identifier.doi10.1002/adma.201907058
dc.identifier.urihttp://hdl.handle.net/10754/667235
dc.description.abstractThe development of narrow-bandgap (Eg ≈ 1.2 eV) mixed tin–lead (Sn–Pb) halide perovskites enables all-perovskite tandem solar cells. Whereas pure-lead halide perovskite solar cells (PSCs) have advanced simultaneously in efficiency and stability, achieving this crucial combination remains a challenge in Sn–Pb PSCs. Here, Sn–Pb perovskite grains are anchored with ultrathin layered perovskites to overcome the efficiency-stability tradeoff. Defect passivation is achieved both on the perovskite film surface and at grain boundaries, an approach implemented by directly introducing phenethylammonium ligands in the antisolvent. This improves device operational stability and also avoids the excess formation of layered perovskites that would otherwise hinder charge transport. Sn–Pb PSCs with fill factors of 79% and a certified power conversion efficiency (PCE) of 18.95% are reported—among the highest for Sn–Pb PSCs. Using this approach, a 200-fold enhancement in device operating lifetime is achieved relative to the nonpassivated Sn–Pb PSCs under full AM1.5G illumination, and a 200 h diurnal operating time without efficiency drop is achieved under filtered AM1.5G illumination.
dc.description.sponsorshipM.W. and K.X. contributed equally to this work. This publication was based in part on work supported by the US Office of Naval Research (Grant Award No.: N00014-17-1-2524), by an award (OSR-2017-CPF-3321-03) from the King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program, and by the Natural Sciences and Engineering Research Council (NSERC) of Canada. The work of H.T. was supported by National Key R&D Program of China (Grant No. 2018YFB1500102), the National Natural Science Foundation of China (Grant No. 61974063), the Jiangsu Provincial Natural Science Foundation (BK20190315), and the Thousand Talent Program for Young Outstanding Scientists in China. M.I.S. acknowledges the Government of Canada’s Banting Postdoctoral Fellowship Program for financial support.
dc.publisherWiley
dc.relation.urlhttps://onlinelibrary.wiley.com/doi/abs/10.1002/adma.201907058
dc.rightsArchived with thanks to Advanced Materials
dc.titleCombining Efficiency and Stability in Mixed Tin–Lead Perovskite Solar Cells by Capping Grains with an Ultrathin 2D Layer
dc.typeArticle
dc.identifier.journalAdvanced Materials
dc.rights.embargodate2021-03-01
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Electrical and Computer EngineeringUniversity of Toronto Toronto Ontario M5S 3G4 Canada
dc.contributor.institutionNational Laboratory of Solid State MicrostructuresJiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied SciencesNanjing University Nanjing 210093 China
dc.contributor.institutionDepartment of ChemistryUniversity of Toronto 80 St. George Street Toronto Ontario M5S 3G4 Canada
dc.contributor.institutionDepartment of Pharmaceutical SciencesLeslie Dan Faculty of PharmacyUniversity of Toronto Toronto Ontario M5S 3M2 Canada
dc.identifier.volume32
dc.identifier.issue12
dc.identifier.pages1907058
kaust.grant.numberOSR-2017-CPF-3321-03
kaust.acknowledged.supportUnitOSR


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