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Title: Quasi-freestanding graphene-on-single walled carbon nanotube electrode for applications in organic light-emitting diode
Authors: Liu, Y.
Jung, E.
Wang, Y.
Zheng, Y.
Park, E.J.
Cho, S.M.
Loh, K.P. 
Keywords: "quasi-freestanding"
few-layer graphene
organic light-emitting diodes
single walled carbon nanotubes arrays
transparent conductive films
Issue Date: 12-Mar-2014
Citation: Liu, Y., Jung, E., Wang, Y., Zheng, Y., Park, E.J., Cho, S.M., Loh, K.P. (2014-03-12). Quasi-freestanding graphene-on-single walled carbon nanotube electrode for applications in organic light-emitting diode. Small 10 (5) : 944-949. ScholarBank@NUS Repository.
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 °C) 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/m2, 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°. A high efficiency organic light emitting diode (OLED) is fabricated on a flexible and transparent electrode made from "quasi-freestanding" graphene supported on laterally aligned single walled carbon nanotubes, and doped with 1-pyrenebutyric acid N-hydroxysuccinimide ester. The all-carbon electrode exhibits highly stable sheet resistance of 76 Ω/square. © 2013 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim.
Source Title: Small
ISSN: 16136810
DOI: 10.1002/smll.201301829
Appears in Collections:Staff Publications

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