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

Citation data:

Nano letters, ISSN: 1530-6992, Vol: 15, Issue: 12, Page: 7933-42

Publication Year:
2015
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Abstract Views 6
Captures 84
Readers 84
Citations 55
Citation Indexes 55
Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/18000
PMID:
26540011
DOI:
10.1021/acs.nanolett.5b03019
Author(s):
Kang, Saewon; Kim, Taehyo; Cho, Seungse; Lee, Youngoh; Choe, Ayoung; Walker, Bright; Ko, Seo-Jin; Kim, Jin Young; Ko, Hyunhyub
Publisher(s):
American Chemical Society (ACS); AMER CHEMICAL SOC
Tags:
Chemical Engineering; Chemistry; Materials Science; Physics and Astronomy; Engineering; Aligned silver nanowire; capillary printing; organic solar cells; polymer light emitting diode; transparent electrodes
article description
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(-1)) as compared to random AgNW networks (92.9%, 20 Ω sq(-1)). Polymer light-emitting diodes (PLEDs) using aligned AgNW electrodes show a 30% enhanced maximum luminance (33068 cd m(-2)) compared to that with random AgNWs and a high luminance efficiency (14.25 cd A(-1)), 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.