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dc.creatorUrcuyo Solórzano, Roberto
dc.creatorDuong, Dinh Loc
dc.creatorSailer, Patrick
dc.creatorBurghard, Marko
dc.creatorKern, Klaus
dc.date.accessioned2022-03-15T16:15:04Z
dc.date.available2022-03-16T13:00:12Z
dc.date.issued2016
dc.identifier.citationhttps://pubs.acs.org/doi/full/10.1021/acs.nanolett.6b02354
dc.identifier.issn1530-6992
dc.identifier.urihttps://hdl.handle.net/10669/86059
dc.description.abstractHot carriers in semiconductor or metal nanostructures are relevant, for instance, to enhance the activity of oxide-supported metal catalysts or to achieve efficient photodetection using ultrathin semiconductor layers. Moreover, rapid collection of photoexcited hot carriers can improve the efficiency of solar cells, with a theoretical maximum of 85%. Because of the long lifetime of secondary excited electrons, graphene is an especially promising two-dimensional material to harness hot carriers for solar-to-electricity conversion. However, the photoresponse of thus far realized graphene photoelectric devices is mainly governed by thermal effects, which yield only a very small photovoltage. Here, we report a Gr–TiOx–Ti heterostructure wherein the photovoltaic effect is predominant. By doping the graphene, the open circuit voltage reaches values up to 0.30 V, 2 orders of magnitude larger than for devices relying upon the thermoelectric effect. The photocurrent turned out to be limited by trap states in the few-nanometer-thick TiOx layer. Our findings represent a first valuable step toward the integration of graphene into third-generation solar cells based upon hot carrier extraction.en
dc.format.extent6761-6766
dc.language.isoInglés
dc.sourceNano Letters, 16(11), pp. 6761-6766
dc.subjectHot carrieren
dc.subjectGrapheneen
dc.subjectPhotovoltaic devicesen
dc.subjectTwo-dimensional (2D) materialsen
dc.subjectF4-TCNQen
dc.subjectGr−TiOx−Ti heterostructuresen
dc.titleHot carrier extraction from multilayer grapheneen
dc.typeartículo
dc.identifier.doi10.1021/acs.nanolett.6b02354
dc.description.procedenceUCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Básicas::Centro de Investigación en Electroquímica y Energía Química (CELEQ)


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