dc.creator | Urcuyo Solórzano, Roberto | |
dc.creator | Duong, Dinh Loc | |
dc.creator | Sailer, Patrick | |
dc.creator | Burghard, Marko | |
dc.creator | Kern, Klaus | |
dc.date.accessioned | 2022-03-15T16:15:04Z | |
dc.date.available | 2022-03-16T13:00:12Z | |
dc.date.issued | 2016 | |
dc.identifier.citation | https://pubs.acs.org/doi/full/10.1021/acs.nanolett.6b02354 | |
dc.identifier.issn | 1530-6992 | |
dc.identifier.uri | https://hdl.handle.net/10669/86059 | |
dc.description.abstract | Hot 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.extent | 6761-6766 | |
dc.language.iso | Inglés | |
dc.source | Nano Letters, 16(11), pp. 6761-6766 | |
dc.subject | Hot carrier | en |
dc.subject | Graphene | en |
dc.subject | Photovoltaic devices | en |
dc.subject | Two-dimensional (2D) materials | en |
dc.subject | F4-TCNQ | en |
dc.subject | Gr−TiOx−Ti heterostructures | en |
dc.title | Hot carrier extraction from multilayer graphene | en |
dc.type | artículo original | |
dc.identifier.doi | 10.1021/acs.nanolett.6b02354 | |
dc.description.procedence | UCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Básicas::Centro de Investigación en Electroquímica y Energía Química (CELEQ) | |