Journal
SYNTHETIC METALS
Volume 198, Issue -, Pages 31-35Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2014.09.033
Keywords
Single wall carbon nanotube; Poly(3,4-ethylenedioxythiophene); SWNT/PEDOT nanocomposite; Flexible transparent electrode; Flexible organic light-emitting diode
Funding
- National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2011-0027256]
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We prepared a flexible transparent electrode comprising a single wall carbon nanotube/poly(3,4-ethylenedioxythiophene) (SWNT/PEDOT) nanocomposite in which the PEDOT matrix was in-situ polymerized on the preformed SWNT conducting network. With the aid of the SWNT network, the SWNT/PEDOT nanocomposite film gave a much lower surface resistance (similar to 160 Omega/square) with a high transmittance (86% at 550 nm), compared with the neat PEDOT film of the same thickness. Current mapping of the nanocomposite film surface by conductive-atomic force microscopy (C-AFM) exhibited that most of SWNTs participate in the conducting network while the PEDOT matrix provides electrical pathways across the separated SWNT chains and enables a smoother, pore-free film with a uniform current flow on the overall surface of the film. When the SWNT/PEDOT nanocomposite film was employed as an anode of Alq3-based flexible organic light-emitting diode (FOLED), the device demonstrated similar to 3 times enhanced brightness and similar to 1.9 times enhanced current efficiency than the device with the neat PEDOT anode. (C) 2014 Elsevier B.V. All rights reserved.
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