Capillary Printing of Highly Aligned Silver Nanowire Transparent Electrodes for High-Performance Optoelectronic Devices

다국어 초록 (Multilingual Abstract)

<P>Percolation networks of silver nanowires (AgNWs) are commonly used as transparent conductive electrodes (TCEs) for a variety of optoelectronic applications, but there have been no attempts to precisely control the percolation networks of AgNWs that critically affect the performances of TCEs. Here, we introduce a capillary printing technique to precisely control the NW alignment and the percolation behavior of AgNW networks. Notably, partially aligned AgNW networks exhibit a greatly lower percolation threshold, which leads to the substantial improvement of optical transmittance (96.7%) at a similar sheet resistance (19.5 Ω sq<SUP>–1</SUP>) as compared to random AgNW networks (92.9%, 20 Ω sq<SUP>–1</SUP>). Polymer light-emitting diodes (PLEDs) using aligned AgNW electrodes show a 30% enhanced maximum luminance (33068 cd m<SUP>–2</SUP>) compared to that with random AgNWs and a high luminance efficiency (14.25 cd A<SUP>–1</SUP>), which is the highest value reported so far using indium-free transparent electrodes for fluorescent PLEDs. In addition, polymer solar cells (PSCs) using aligned AgNW electrodes exhibit a power conversion efficiency (PCE) of 8.57%, the highest value ever reported to date for PSCs using AgNW electrodes.</P><P><B>Graphic Abstract</B>
<IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/nalefd/2015/nalefd.2015.15.issue-12/acs.nanolett.5b03019/production/images/medium/nl-2015-030195_0005.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl5b03019'>ACS Electronic Supporting Info</A></P>