1.4 µm-Thick Transparent Radio Frequency Transmission Lines Based on Instant Fusion of Polyethylene Terephthalate Through Surface of Ag Nanowires

김상우; 김광석; 박명구; Wansoo Nah; 김대업; Cheul-Ro Lee; Seung-Boo Jung; 김종웅

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자료유형: 학술저널

저자정보: 김상우 (성균관대학교) 김광석 (Korea Institute of Industrial Technology) 박명구 (Sungkyunkwan University) Wansoo Nah (Sungkyunkwan University Korea.) 김대업 (Korea Institute of Industrial Technology) Cheul-Ro Lee (Chonbuk National University) Seung-Boo Jung (Sungkyunkwan University) 김종웅 (전북대학교)

저널정보: 대한금속·재료학회 Electronic Materials Letters Electronic Materials Letters Vol.14 No.5

발행연도: 2018.1

수록면: 599 - 609 (11page)

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Though a percolated network of silver nanowires (AgNWs) has been considered the most promising flexible transparent electrodebecause of it high conductivity, high transmittance, and excellent flexibility, fabrication of AgNW-based transmissionlines designed to conduct high frequency signals has been scarcely reported. The fabrication and performance of extremelythin (1.4 μm thick) and low lossy (smaller than − 17 dB for reflection coefficient corresponding to 2.5 GHz) transmissionlines with unprecedented transparency (higher than 90% for the entire visible light spectrum) are demonstrated in this study. AgNWs deposited onto a 1.4 μm-thick polyethylene terephthalate (PET) sheet were irradiated by intense-pulsed-light toselectively raise their temperature. The intensive photon energy delivered to the AgNWs simultaneously caused the activediffusion of Ag atoms and plasmonic welding, resulting in large drops in resistivity without drastic changes in their physicalshape or the optical transmittance of the films. Furthermore, absorption of heat also thermally activated the underlyingpolymer and causing it to react with the surface of the AgNWs—this results in enhanced adhesion between the AgNWsand the PET. Measurements and simulation of specially designed coplanar waveguide circuits revealed that the fabricatedelectrode could simultaneously provide excellent transmission characteristics and mechanical stability and transparency.

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