Silver Nanowire Electrodes: Conductivity Improvement Without Post-treatment and Application in Capacitive Pressure Sensors.
Silver Nanowire Electrodes: Conductivity Improvement Without Post-treatment and Application in Capacitive Pressure Sensors.
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DOI：
10.1007/s40820-014-0018-0
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发表时间：
2015
影响因子：
26.6
通讯作者：
Suganuma K
中科院分区：
文献类型：
--
作者：
Wang J;Jiu J;Araki T;Nogi M;Sugahara T;Nagao S;Koga H;He P;Suganuma K
基于银纳米线（AgNWs）的透明电极是铟锡氧化物薄膜的一种优秀替代品，尤其适用于柔性电子产品。然而，在高透射率下，AgNW透明电极的导电性仍然受到纳米线之间的接触电阻的显著限制。吸附在纳米线表面的聚乙烯吡咯烷酮（PVP）层作为线-线连接处的电绝缘屏障，并且提出了一些破坏性的后处理方法来减少或消除PVP层，这些方法通常限制了对热或压力敏感的基底的应用，并且使制造过程负担高成本、耗时或低效的过程。本工作提出了一种简单快速的预处理清洗方法，将PVP层的厚度从13.19 nm降低到0.96 nm，改善了导线之间的接触。AgNW电极的薄层电阻分别为15.6和204 Ω sq−1，透射率分别为90%和97.5%。该方法避免了任何后处理，推广了高性能银纳米线透明电极在更多基板上的应用。改进的银纳米线成功地应用于电容式压力传感器，具有高透明度，灵敏度和重现性。本文的在线版本（doi：10.1007/s40820-014-0018-0）包含补充材料，可供授权用户使用。
Transparent electrode based on silver nanowires (AgNWs) emerges as an outstanding alternative of indium tin oxide film especially for flexible electronics. However, the conductivity of AgNWs transparent electrode is still dramatically limited by the contact resistance between nanowires at high transmittance. Polyvinylpyrrolidone (PVP) layer adsorbed on the nanowire surface acts as an electrically insulating barrier at wire–wire junctions, and some devastating post-treatment methods are proposed to reduce or eliminate PVP layer, which usually limit the application of the substrates susceptible to heat or pressure and burden the fabrication with high-cost, time-consuming, or inefficient processes. In this work, a simple and rapid pre-treatment washing method was proposed to reduce the thickness of PVP layer from 13.19 to 0.96 nm and improve the contact between wires. AgNW electrodes with sheet resistances of 15.6 and 204 Ω sq−1 have been achieved at transmittances of 90 and 97.5 %, respectively. This method avoided any post-treatments and popularized the application of high-performance AgNW transparent electrode on more substrates. The improved AgNWs were successfully employed in a capacitive pressure sensor with high transparency, sensitivity, and reproducibility. The online version of this article (doi:10.1007/s40820-014-0018-0) contains supplementary material, which is available to authorized users.
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