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Silver Nanowires on Carbon Nanotube Aerogel Sheets for Flexible, Transparent Electrodes

Author:
Martinez, Patricia M., Ishteev, Arthur, Fahimi, Azin, Velten, Josef, Jurewicz, Izabela, Dalton, Alan B., Collins, Steve, Baughman, Ray H., Zakhidov, Anvar A.
Source:
ACS applied materials & interfaces 2019 v.11 no.35 pp. 32235-32243
ISSN:
1944-8252
Subject:
aerogels, anisotropy, carbon nanotubes, electrodes, mass density, nanosilver, nanowires, transmittance
Abstract:
Flexible, free-standing transparent conducting electrodes (TCEs) with simultaneously tunable transmittances up to 98% and sheet resistances down to 11 Ω/sq were prepared by a facile spray-coating method of silver nanowires (AgNWs) onto dry-spun multiwall carbon nanotube (MWNT) aerogels. Counterintuitively, the transmittance of the hybrid electrodes can be increased as the mass density of AgNWs within the MWNT aerogels increases; however, the final achievable transmittance depends on the initial transparency of the MWNT aerogels. Simultaneously, a strong decrease in sheet resistance is obtained when AgNWs form a percolated network along the MWNT aerogel. Additionally, anisotropic reduction in sheet resistance and polarized transmittance of AgNW/MWNT aerogels is achieved with this method. The final AgNW/MWNT hybrid TCEs transmittance and sheet resistance can be fine-tuned by spray-coating mechanisms or by choosing initial MWNT aerogel density. Thus, a wide range of AgNW/MWNT hybrid TCEs with optimized optoelectronic properties can be achieved depending of the requirements needed. Finally, the free-standing AgNW/MWNT hybrid TCEs can be laminated onto a wide range of substrates without the need of a bonding aid.
Agid:
6625090