title: Solution-processed transparent blue organic light-emitting diodes with graphene as the top cathode.
abstract: Graphene thin films have great potential to function as transparent electrodes in organic electronic devices, due to their excellent conductivity and high transparency. Recently, organic light-emitting diodes (OLEDs)have been successfully demonstrated to possess high luminous efficiencies with p-doped graphene anodes. However, reliable methods to fabricate n-doped graphene cathodes have been lacking, which would limit the application of graphene in flexible electronics. In this paper, we demonstrate fully solution-processed OLEDs with n-type doped multilayer graphene as the top electrode. The work function and sheet resistance of graphene are modified by an aqueous process which can also transfer graphene on organic devices as the top electrodes. With n-doped graphene layers used as the top cathode, all-solution processed transparent OLEDs can be fabricated without any vacuum process.
authors.affiliation: Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei, Taiwan 106, R.O.C.
authors.forename: Jung-Hung
authors.initials: JH
authors.lastname: Chang
authors.affiliation: Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei, Taiwan 106, R.O.C.
authors.forename: Wei-Hsiang
authors.initials: WH
authors.lastname: Lin
authors.affiliation: Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei, Taiwan 106, R.O.C.
authors.forename: Po-Chuan
authors.initials: PC
authors.lastname: Wang
authors.affiliation: Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei, Taiwan 106, R.O.C.
authors.forename: Jieh-I
authors.initials: JI
authors.lastname: Taur
authors.affiliation: Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei, Taiwan 106, R.O.C.
authors.forename: Ting-An
authors.initials: TA
authors.lastname: Ku
authors.affiliation: Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei, Taiwan 106, R.O.C.
authors.forename: Wei-Ting
authors.initials: WT
authors.lastname: Chen
authors.affiliation: Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei, Taiwan 106, R.O.C.
authors.forename: Shiang-Jiuan
authors.initials: SJ
authors.lastname: Yan
authors.affiliation: Graduate Institute of Photonics and Optoelectronics &Department of Electrical and Engineering, National Taiwan University, Taipei 106, Taiwan 106, R.O.C.
authors.forename: Chih-I
authors.initials: CI
authors.lastname: Wu