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Open AccessFeature PaperArticle

Novel Hybrid Conductor of Irregularly Patterned Graphene Mesh and Silver Nanowire Networks

1
Department of Chemical Engineering, Kwangwoon University, Seoul 01897, Korea
2
Department of Electronic Material Engineering, Kwangwoon University, Seoul 01897, Korea
3
Material Research Center, Samsung Advanced Institute of Technology (SAIT), Samsung Electronics, Suwon 16678, Korea
4
Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
*
Author to whom correspondence should be addressed.
Micromachines 2020, 11(6), 578; https://doi.org/10.3390/mi11060578
Received: 4 May 2020 / Revised: 3 June 2020 / Accepted: 4 June 2020 / Published: 9 June 2020
(This article belongs to the Special Issue Organic Electronic Devices, Volume II)
We prepared the hybrid conductor of the Ag nanowire (NW) network and irregularly patterned graphene (GP) mesh with enhanced optical transmittance (~98.5%) and mechano-electric stability (ΔR/Ro: ~42.4% at 200,000 (200k) cycles) under 6.7% strain. Irregularly patterned GP meshes were prepared with a bottom-side etching method using chemical etchant (HNO3). The GP mesh pattern was judiciously and easily tuned by the regulation of treatment time (0–180 min) and concentration (0–20 M) of chemical etchants. As-formed hybrid conductor of Ag NW and GP mesh exhibit enhanced/controllable electrical-optical properties and mechano-electric stabilities; hybrid conductor exhibits enhanced optical transmittance (TT = 98.5%) and improved conductivity (ΔRs: 22%) compared with that of a conventional hybrid conductor at similar TT. It is also noteworthy that our hybrid conductor shows far superior mechano-electric stability (ΔR/Ro: ~42.4% at 200k cycles; TT: ~98.5%) to that of controls (Ag NW (ΔR/Ro: ~293% at 200k cycles), Ag NW-pristine GP hybrid (ΔR/Ro: ~121% at 200k cycles)) ascribed to our unique hybrid structure. View Full-Text
Keywords: irregular patterning; graphene mesh; silver nanowire; hybrid conductor; chemical etching; flexible transparent conducting film; bending stability irregular patterning; graphene mesh; silver nanowire; hybrid conductor; chemical etching; flexible transparent conducting film; bending stability
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Sohn, H.; Shin, W.H.; Seok, D.; Lee, T.; Park, C.; Oh, J.-M.; Kim, S.Y.; Seubsai, A. Novel Hybrid Conductor of Irregularly Patterned Graphene Mesh and Silver Nanowire Networks. Micromachines 2020, 11, 578.

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