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Reduced graphene oxide wrapped core-shell metal nanowires as promising flexible transparent conductive electrodes with enhanced stability

Title
Reduced graphene oxide wrapped core-shell metal nanowires as promising flexible transparent conductive electrodes with enhanced stability
Authors
Kim J.Lim J.W.Mota F.M.Lee J.-E.Boppella R.Lim K.Y.Kim K.Choi W.K.Kim D.H.
Ewha Authors
김동하김경곤
SCOPUS Author ID
김동하scopus; 김경곤scopus
Issue Date
2016
Journal Title
Nanoscale
ISSN
2040-3364JCR Link
Citation
vol. 8, no. 45, pp. 18938 - 18944
Publisher
Royal Society of Chemistry
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Transparent conductive electrodes (TCEs) are widely used in a wide range of optical-electronic devices. Recently, metal nanowires (NWs), e.g. Ag and Cu, have drawn attention as promising flexible materials for TCEs. Although the study of core-shell metal NWs, and the encapsulation/overcoating of the surface of single-metal NWs have separately been an object of focus in the literature, herein for the first time we simultaneously applied both strategies in the fabrication of highly stable Ag-Cu NW-based TCEs by the utilization of Ag nanoparticles covered with reduced graphene oxide (rGO). The incorporation of Ag nanoparticles by galvanic displacement reaction was shown to significantly increase the long term stability of the electrode. Upon comparison with a CuNW reference, our novel rGO/Cu-AgNW-based TCEs unveiled remarkable opto-electrical properties, with a 3-fold sheet resistance decrease (from 29.8 Ω sq-1 to 10.0 Ω sq-1) and an impressive FOM value (139.4). No detrimental effect was noticed in the relatively high transmittance value (T = 77.6% at 550 nm) characteristic of CuNWs. In addition, our rGO/Cu-AgNW-based TCEs exhibited outstanding thermal stability up to 20 days at 80 °C in air, as well as improved mechanical flexibility. The superior performance herein reported compared with both CuNWs and AgNWs, and with a current conventional ITO reference, is believed to highlight the great potential of these novel materials as promising alternatives in optical-electronic devices. © The Royal Society of Chemistry.
DOI
10.1039/c6nr05460a
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자연과학대학 > 화학·나노과학전공 > Journal papers
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