Hybrid J-Aggregate–graphene phototransistor

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buir.contributor.authorBalcı, Osman
buir.contributor.authorUzlu, Burkay
buir.contributor.authorYakar, Ozan
buir.contributor.authorPolat, Nahit
buir.contributor.authorTunç, İlknur
buir.contributor.authorKocabaş, Coşkun
buir.contributor.authorBalcı, Sinan
dc.citation.epage417en_US
dc.citation.issueNumber1en_US
dc.citation.spage409en_US
dc.citation.volumeNumber3en_US
dc.contributor.authorBalcı, Osman
dc.contributor.authorUzlu, Burkay
dc.contributor.authorYakar, Ozan
dc.contributor.authorPolat, Nahit
dc.contributor.authorAri, O.
dc.contributor.authorTunç, İlknur
dc.contributor.authorKocabaş, Coşkun
dc.contributor.authorBalcı, Sinan
dc.date.accessioned2021-02-12T09:10:55Z
dc.date.available2021-02-12T09:10:55Z
dc.date.issued2020
dc.departmentDepartment of Chemistryen_US
dc.departmentDepartment of Physicsen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractJ-aggregates are fantastic self-assembled chromophores with a very narrow and extremely sharp absorbance band in the visible and near-infrared spectrum, and hence they have found many exciting applications in nonlinear optics, sensing, optical devices, photography, and lasing. In silver halide photography, for example, they have enormously improved the spectral sensitivity of photographic process due to their fast and coherent energy migration ability. On the other hand, graphene, consisting of single layer of carbon atoms forming a hexagonal lattice, has a very low absorption coefficient. Inspired by the fact that J-aggregates have carried the role to sense the incident light in silver halide photography, we would like to use Jaggregates to increase spectral sensitivity of graphene in the visible spectrum. Nevertheless, it has been an outstanding challenge to place isolated J-aggregate films on graphene to extensively study interaction between them. We herein noncovalently fabricate isolated J-aggregate thin films on graphene by using a thin film fabrication technique we termed here membrane casting (MC). MC significantly simplifies thin film formation of water-soluble substances on any surface via porous polymer membrane. Therefore, we reversibly modulate the Dirac point of graphene in the J-aggregate/graphene van der Waals (vdW) heterostructure and demonstrate an all-carbon phototransistor gated by visible light. Owing to the hole transfer from excited excitonic thin film to graphene layer, graphene is hole-doped. In addition, spectral and power responses of the all-carbon phototransistor have been measured by using a tunable laser in the visible spectrum. The first integration of J-aggregates with graphene in a transistor structure enables one to reversibly write and erase charge doping in graphene with visible light that paves the way for using J-aggregate/graphene vdW heterostructures in optoelectronic applications.en_US
dc.identifier.doi10.1021/acsanm.9b02039en_US
dc.identifier.issn2574-0970
dc.identifier.urihttp://hdl.handle.net/11693/55100
dc.language.isoEnglishen_US
dc.publisherAmerican Chemical Societyen_US
dc.relation.isversionofhttps://dx.doi.org/10.1021/acsanm.9b02039en_US
dc.source.titleACS Applied Nano Materialsen_US
dc.subjectJ-aggregatesen_US
dc.subjectGrapheneen_US
dc.subjectFrenkel excitonen_US
dc.subjectMembrane castingen_US
dc.subjectField effect transistoren_US
dc.subjectPhototransistoren_US
dc.subjectDirac pointen_US
dc.subjectOptoelectronicsen_US
dc.subjectPhotodetectoren_US
dc.titleHybrid J-Aggregate–graphene phototransistoren_US
dc.typeArticleen_US
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