title: "Quasi-freestanding" graphene-on-single walled carbon nanotube electrode for applications in organic light-emitting diode.
abstract: An air-stable transparent conductive film with "quasi-freestanding" graphene supported on horizontal single walled carbon nanotubes (SWCNTs) arrays is fabricated. The sheet resistance of graphene films stacked via layer-by-layer transfer (LBL) on quartz, and modified by 1-Pyrenebutyric acid N-hydroxysuccinimide ester (PBASE), is reduced from 273 Ω/sq to about 76 Ω/sq. The electrical properties are stable to heat treatment (up to 200 ºC) and ambient exposure. Organic light-emitting diodes (OLEDs) constructed of this carbon anode (T ≈ 89.13% at 550 nm) exhibit ≈88% power efficiency of OLEDs fabricated on an ITO anode (low turn on voltage ≈3.1 eV, high luminance up to ≈29 490 cd/m(2) , current efficiency ≈14.7 cd/A). Most importantly, the entire graphene-on-SWCNT hybrid electrodes can be transferred onto plastic (PET) forming a highly-flexible OLED device, which continues to function without degradation in performance at bending angles >60°.
authors.affiliation: Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore.
authors.forename: Yanpeng
authors.initials: Y
authors.lastname: Liu
authors.forename: Eun
authors.initials: E
authors.lastname: Jung
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.forename: Yi
authors.initials: Y
authors.lastname: Zheng
authors.forename: Eun Ji
authors.initials: EJ
authors.lastname: Park
authors.forename: Sung Min
authors.initials: SM
authors.lastname: Cho
authors.forename: Kian Ping
authors.initials: KP
authors.lastname: Loh
keywords: few-layer graphene; organic light-emitting diodes; single walled carbon nanotubes arrays; transparent conductive films; “quasi-freestanding”