Flexible Indium-Tin Oxide Crystal on Plastic Substrates Supported by Graphene Monolayer.

Author(s) Lee, S.Jin; Kim, Y.; Hwang, J.Y.; Lee, J.H.; Jung, S.; Park, H.; Cho, S.; Nahm, S.; Yang, W.Seok; Kim, H.; Han, S.Ho
Journal Sci Rep
Date Published 2017 Jun 09

Flexible and crystallized indium-tin oxide (ITO) thin films were successfully obtained on plastic polyethylene terephthalate (PET) films with monolayered graphene as a platform. The highly crystalline ITO (c-ITO) was first fabricated on a rigid substrate of graphene on copper foil and it was subsequently transferred onto a PET substrate by a well-established technique. Despite the plasma damage during ITO deposition, the graphene layer effectively acted as a Cu-diffusion barrier. The c-ITO/graphene/PET electrode with the 60-nm-thick ITO exhibited a reasonable sheet resistance of ~45 Ω sq(-1) and a transmittance of ~92% at a wavelength of 550 nm. The c-ITO on the monolayered graphene support showed significant enhancement in flexibility compared with the ITO/PET film without graphene because the atomically controlled monolayered graphene acted as a mechanically robust support. The prepared flexible transparent c-ITO/graphene/PET electrode was applied as the anode in a bulk heterojunction polymer solar cell (PSC) to evaluate its performance, which was comparable with that of the commonly used c-ITO/glass electrode. These results represent important progress in the fabrication of flexible transparent electrodes for future optoelectronics applications.

DOI 10.1038/s41598-017-02265-3
ISSN 2045-2322
Citation Sci Rep. 2017;7(1):3131.

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