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dc.contributor.authorLedinský, Martin
dc.contributor.authorVlk, Aleš
dc.contributor.authorSchönfeldová, Tereza
dc.contributor.authorHolovský, Jakub
dc.contributor.authorAydin, Erkan
dc.contributor.authorDang, Hoang X.
dc.contributor.authorHájková, Zdeňka
dc.contributor.authorLandová, Lucie
dc.contributor.authorValenta, Jan
dc.contributor.authorFejfar, Antonín
dc.contributor.authorDe Wolf, Stefaan
dc.date.accessioned2020-12-16T07:41:36Z
dc.date.available2020-12-16T07:41:36Z
dc.date.issued2020-12-08
dc.date.submitted2020-09-08
dc.identifier.citationLedinský, M., Vlk, A., Schönfeldová, T., Holovský, J., Aydin, E., Dang, H. X., … De Wolf, S. (2020). Impact of Cation Multiplicity on Halide Perovskite Defect Densities and Solar Cell Voltages. The Journal of Physical Chemistry C. doi:10.1021/acs.jpcc.0c08193
dc.identifier.issn1932-7447
dc.identifier.issn1932-7455
dc.identifier.doi10.1021/acs.jpcc.0c08193
dc.identifier.urihttp://hdl.handle.net/10754/666398
dc.description.abstractMetal-halide perovskites feature very low deep-defect densities, thereby enabling high operating voltages at the solar cell level. Here, by precise extraction of their absorption spectra, we find that the low deep-defect density is unaffected when cations such as Cs+ and Rb+ are added during the perovskite synthesis. By comparing single crystals and polycrystalline thin films of methylammonium lead iodide/bromide, we find these defects to be predominantly localized at surfaces and grain boundaries. Furthermore, generally, for the most important photovoltaic materials, we demonstrate a strong correlation between their Urbach energy and open-circuit voltage deficiency at the solar cell level. Through external quantum yield photoluminescence efficiency measurements, we explain these results as a consequence of nonradiative open-circuit voltage losses in the solar cell. Finally, we define practical power conversion efficiency limits of solar cells by taking into account the Urbach energy.
dc.description.sponsorshipThe authors acknowledge the support of the Czech Science Foundation (Project No. 17-26041Y), Operational Programme Research, Development, and Education financed by the European Structural and Investment Funds and the Czech Ministry of Education, Youth and Sports (Project No. CZ.02.1.01/0.0/0.0/16_019/0000760SOLID21 and CzechNanoLab Research Infrastructure LM2018110). E.A., H.X.D., and S.D.W. acknowledge financial support under Award No. OSR-CARF URF/1/3079-33-01 by King Abdullah University of Science and Technology (KAUST). J.V. acknowledges support from the Charles University Research Centre (UNCE/SCI/010).
dc.publisherAmerican Chemical Society (ACS)
dc.relation.urlhttps://pubs.acs.org/doi/10.1021/acs.jpcc.0c08193
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acs.jpcc.0c08193.
dc.titleImpact of Cation Multiplicity on Halide Perovskite Defect Densities and Solar Cell Voltages
dc.typeArticle
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentKAUST Solar Center (KSC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentKAUST Solar Center (KSC)
dc.identifier.journalThe Journal of Physical Chemistry C
dc.rights.embargodate2021-12-08
dc.eprint.versionPost-print
dc.contributor.institutionLaboratory of Thin Films, Institute of Physics, ASCR, 162 00 Prague, Czech Republic
dc.contributor.institutionCentre for Advanced Photovoltaics, Faculty of Electrical Engineering, Czech Technical University in Prague, 166 27 Prague, Czech Republic
dc.contributor.institutionDepartment of Chemical Physics and Optics, Faculty of Mathematics and Physics, Charles University, 121 16 Prague, Czech Republic
kaust.personAydin, Erkan
kaust.personDang, Hoang X.
kaust.personDe Wolf, Stefaan
kaust.grant.numberOSR-CARF URF/1/3079-33-01
dc.date.accepted2020-10-23
refterms.dateFOA2020-12-17T06:09:29Z
kaust.acknowledged.supportUnitOSR


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