Charge-carrier mobility and localization in semiconducting Cu2AgBiI6 for photovoltaic applications

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dc.contributor.affiliationDepartamento de Física Aplicada
dc.contributor.affiliationInstituto de Diseño para la Fabricación y Producción Automatizada
dc.contributor.authorBuizza, Leonardo R. V.es_ES
dc.contributor.authorWright, Adam D.es_ES
dc.contributor.authorLongo, Giulia
dc.contributor.authorSansom, Harry C.es_ES
dc.contributor.authorXia, Chelsea Q.es_ES
dc.contributor.authorRosseinsky, Matthew J.es_ES
dc.contributor.authorJohnston, Michael B.es_ES
dc.contributor.authorSnaith, Henry J.es_ES
dc.contributor.authorHerz, Laura M.es_ES
dc.contributor.funderEngineering and Physical Sciences Research Council, Reino Unidoes_ES
dc.date.accessioned2026-02-26T06:52:42Z
dc.date.available2026-02-26T06:52:42Z
dc.date.issued2021-05-14es_ES
dc.description.abstract[EN] Lead-free silver-bismuth semiconductors have become increasingly popular materials for optoelectronic applications, building upon the success of lead halide perovskites. In these materials, charge-lattice couplings fundamentally determine charge transport, critically affecting device performance. In this study, we investigate the optoelectronic properties of the recently discovered lead-free semiconductor Cu2AgBiI6 using temperature-dependent photoluminescence, absorption, and optical-pump terahertz-probe spectroscopy. We report ultrafast charge-carrier localization effects, evident from sharp THz photoconductivity decays occurring within a few picoseconds after excitation and a rise in intensity with decreasing temperature of long-lived, highly Stokes-shifted photoluminescence. We conclude that charge carriers in Cu2AgBiI6 are subject to strong charge-lattice coupling. However, such small polarons still exhibit mobilities in excess of 1 cm(2) V-1 s(-1) at room temperature because of low energetic barriers to formation and transport. Together with a low exciton binding energy of similar to 29 meV and a direct band gap near 2.1 eV, these findings highlight Cu2AgBiI6 as an attractive lead-free material for photovoltaic applications.en_EN
dc.description.accrualMethodSes_ES
dc.description.bibliographicCitationBuizza, LRV.; Wright, AD.; Longo, Giulia; Sansom, HC.; Xia, CQ.; Rosseinsky, MJ.; Johnston, MB.... (2021). Charge-carrier mobility and localization in semiconducting Cu2AgBiI6 for photovoltaic applications. ACS Energy Letters. 6(5):1729-1739. https://doi.org/10.1021/acsenergylett.1c00458es_ES
dc.description.issue5es_ES
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dc.description.sponsorshipThe authors acknowledge the Engineering and Physical Sciences Research Council (EPSRC) for financial support. L.R.V.B. gives thanks to the Centre for Doctoral Training in New and Sustainable Photovoltaics and to the OxfordRadcliffe Scholarship for financial support. H.C.S gives thanks for funding from the EPSRC Prosperity Partnership EP/S004947/1. L.M.H. thanks TUM-IAS for a Hans Fischer Senior Fellowship.es_ES
dc.description.upvformatpfin1739es_ES
dc.description.upvformatpinicio1729es_ES
dc.description.volume6es_ES
dc.identifier.doi10.1021/acsenergylett.1c00458es_ES
dc.identifier.eissn2380-8195es_ES
dc.identifier.pmcidPMC8155390
dc.identifier.pmid34056108
dc.identifier.urihttps://riunet.upv.es/handle/10251/232934
dc.languageIngléses_ES
dc.publisherAmerican Chemical Societyes_ES
dc.relation.ispartofACS Energy Letterses_ES
dc.relation.pasarelaS\548410es_ES
dc.relation.projectIDinfo:eu-repo/grantAgreement/EPSRC//EP%2FS004947%2F1/es_ES
dc.relation.publisherversionhttps://doi.org/10.1021/acsenergylett.1c00458es_ES
dc.rightsReconocimiento (by)es_ES
dc.rights.accessRightsAbiertoes_ES
dc.subjectHalide Double Perovskiteses_ES
dc.subjectWhite-light emissiones_ES
dc.subjectTemperature-Dependencees_ES
dc.subjectLattice-Relaxationes_ES
dc.subjectDynamicses_ES
dc.subjectElectrones_ES
dc.subjectCS2AGBIBR6es_ES
dc.subjectExcitones_ES
dc.subjectRecombinationes_ES
dc.subjectMotiones_ES
dc.titleCharge-carrier mobility and localization in semiconducting Cu2AgBiI6 for photovoltaic applicationses_ES
dc.typeArtículoes_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersiones_ES
dspace.entity.typePublicationes_ES
person.identifier799193
person.identifier.orcid0000-0002-1163-1110
relation.isAuthorOfPublicationead1a34c-5ce2-420f-ae9d-925dffeca52b
relation.isAuthorOfPublication.latestForDiscoveryead1a34c-5ce2-420f-ae9d-925dffeca52b
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