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ACS Appl Mater Interfaces. 2018 Jul 18;10(28):24099-24107. doi: 10.1021/acsami.8b03917. Epub 2018 Jul 5.

Selective Wavelength Plasmonic Flash Light Welding of Silver Nanowires for Transparent Electrodes with High Conductivity.

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Department of Mechanical Engineering , Hanyang University , 17 Haengdang-Dong , Seongdong-Gu, Seoul 133-791 , South Korea.
Department of Chemistry , Kongju National University , Gongju-si, Chungcheongnam-do 32588 , South Korea.
N&B Co. Ltd. , 125-10, Techno 2-ro , Yuseong-gu, Daejeon 34024 , South Korea.
Institute of Nano Science and Technology , Hanyang University , Seoul 133-791 , South Korea.


In this work, silver nanowires (AgNWs) printed on a polyethylene terephthalate substrate using a bar coater were welded via selective wavelength plasmonic flash light irradiation. To achieve high electrical conductivity and transparent characteristics, the wavelength of the flash white light was selectively chosen and irradiated by using high-pass, low-pass, and band-pass filters. The flash white light irradiation conditions such as on-time, off-time, and number of pulses were also optimized. The wavelength range (400-500 nm) corresponding to the plasmonic wavelength of the AgNW could efficiently weld the AgNW films and enhance its conductivity. To carry out in-depth study of the welding phenomena with respect to wavelength, a multiphysics COMSOL simulation was conducted. The welded AgNW films under selective plasmonic flash light welding conditions showed the lowest sheet resistance (51.275 Ω/sq) and noteworthy transmittance (95.3%). Finally, the AgNW film, which was welded by selective wavelength plasmonic flash light with optical filters, was successfully used to make a large area transparent heat film and dye-sensitized solar cells showing superior performances.


band-pass filter; flash light welding; intensive plasmonic; optical filter; printed electronics; silver nanowire; wavelength range


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