Flexible Indium-Tin Oxide Crystal on Plastic Substrates Supported by Graphene Monolayer
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- Flexible Indium-Tin Oxide Crystal on Plastic Substrates Supported by Graphene Monolayer
- Lee, Sang Jin; Kim, Yekyung; Hwang, Jun-Yeon; Lee, Ju-Ho; Jung, Seungon; Park, Hyesung; Cho, Seungmin; Nahm, Sahn; Yang, Woo Seok; Kim, Hyeongkeun; Han, Seung Ho
- Issue Date
- NATURE PUBLISHING GROUP
- SCIENTIFIC REPORTS, v.7, no., pp.3131 -
- 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 similar to 45 Omega sq(-1) and a transmittance of similar to 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.
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