title: Tunable functionalization of graphene nanosheets for graphene-organic hybrid photodetectors.
abstract: Graphene-organic hybrid thin films are promising candidates for use as advanced transparent electrodes and high-performance photodetectors. In this work, we fabricated hybrid thin film structures consisting of graphene and either tetraphenyl-porphyrin (H2TPP) or metalloporphyrins such as aluminum (III) tetraphenyl-porphyrin (Al(III)TPP) and zinc tetraphenyl-porphyrin (ZnTPP). The optical and electrical characteristics of ultrathin photodetectors based on the graphene-organic hybrid layers were subsequently evaluated. A hybrid deposition system capable of both thermal evaporation and vapor phase metalation was employed to synthesize the tunable metalloporphyrin-based thin films. As a proof of concept, we successfully fabricated various graphene-based photodetectors via the simple and efficient vapor-phase metalation of porphyrin. This work may facilitate the development of new architectures for flexible graphene-organic devices.
authors.affiliation: Thin Film Materials Research Center, Korea Research Institute of Chemical Technology, Daejeon 305-600, Korea. Nanomaterials Science and Engineering, University of Science and Technology, Daejeon 305-350, Korea.
authors.forename: Seong Jun
authors.initials: SJ
authors.lastname: Kim
authors.forename: Wooseok
authors.initials: W
authors.lastname: Song
authors.forename: Sungho
authors.initials: S
authors.lastname: Kim
authors.forename: Min-A
authors.initials: MA
authors.lastname: Kang
authors.forename: Sung
authors.initials: S
authors.lastname: Myung
authors.forename: Sun
authors.initials: S
authors.lastname: Sook Lee
authors.forename: Jongsun
authors.initials: J
authors.lastname: Lim
authors.forename: Ki-Seok
authors.initials: KS
authors.lastname: An