Raman and X-ray photoelectron spectroscopic studies of graphene devices for identification of doping

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buir.contributor.authorSüzer, Şefik
dc.citation.epage1137en_US
dc.citation.spage1130en_US
dc.citation.volumeNumber425en_US
dc.contributor.authorGokturk, P. A.en_US
dc.contributor.authorKakenov, N.en_US
dc.contributor.authorKocabas, C.en_US
dc.contributor.authorSüzer, Şefiken_US
dc.date.accessioned2018-04-12T11:13:22Z
dc.date.available2018-04-12T11:13:22Z
dc.date.issued2017en_US
dc.departmentDepartment of Chemistryen_US
dc.departmentDepartment of Physicsen_US
dc.description.abstractTunability of electronic properties of graphene is one of the most promising properties to integrate it to high efficiency devices in the field of electronics. Here we demonstrate the substrate induced doping of CVD graphene devices using polymers with different functional groups. Both X-Ray secondary electron cut-off and Raman spectra confirm p-type doping of a PVC-Graphene film when compared to a PMMA-Graphene one. We also systematically analyzed the reversible doping effect of acid-base exposure and UV illumination to further dope/undope the polymer supported graphene devices. The shifts in the Raman 2D band towards lower and then to higher wavenumbers, with sequential exposure to ammonia and hydrochloric acid vapors, suggest n-type doing and restoration of graphene to its original state. Finally, the n-type doping with UV irradiation on half-covered samples was utilized and shown by both XPS and Raman to create two regions with different electronic properties and resistances. These type of controlled and reversible doping routes offer new paths for electronic devices especially towards fabricating graphene p-n junctions.en_US
dc.embargo.release2019-11-15en_US
dc.identifier.doi10.1016/j.apsusc.2017.07.097en_US
dc.identifier.issn0169-4332
dc.identifier.urihttp://hdl.handle.net/11693/37434
dc.language.isoEnglishen_US
dc.publisherElsevier B.V.en_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.apsusc.2017.07.097en_US
dc.source.titleApplied Surface Scienceen_US
dc.subjectGrapheneen_US
dc.subjectPolymer induced dopingen_US
dc.subjectRaman spectroscopyen_US
dc.subjectWork-functionen_US
dc.subjectX-Ray photoelectron spectroscopy (XPS)en_US
dc.titleRaman and X-ray photoelectron spectroscopic studies of graphene devices for identification of dopingen_US
dc.typeArticleen_US

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