A silver nanowire mesh overcoated protection layer with graphene oxide as a transparent electrode for flexible organic solar cells

Title
A silver nanowire mesh overcoated protection layer with graphene oxide as a transparent electrode for flexible organic solar cells
Authors
오영제왕병용이은석강현욱
Keywords
Ag nanowire; Graphene oxide; Transparent electrode; Organic solar cell; ITO; Efficiency
Issue Date
2017-12
Publisher
RSC advances
Citation
VOL 7, NO 83-52922
Abstract
For high-throughput flexible electronic devices to be ready for the market, their transparent conductive electrodes (TCEs) should show stable working performance during folding conditions and have a long operating life. In this study, TCEs were produced by over-coating silver nanowire (AgNW) electrodes with graphene oxide (GO). The GO/AgNW electrodes showed an outstanding sheet resistance value of 18 Omega(-1), 87% transmittance, mechanical stability, and excellent long-term stability. Furthermore, the GO film wrapped around the AgNWs, which improved the inter-nanowire junction resistance and lowered the surface roughness without any heat treatments or high-force pressing processes. Flexible P3HT: PC60BM-and PTB7: PC70BM-based organic solar cells (OSCs) were produced using the GO/AgNW transparent electrodes on a flexible polyethylene terephthalate substrate. The GO/AgNW electrode exhibited a higher optical absorption in all the OSCs compared to those of the indium tin oxide (ITO) electrodes and showed a high short circuit current of 3 mA cm(-2). Consequently, the fabricated OSCs showed a 7% higher efficiency than the ITO electrodes. In addition, after 50 bending tests, the efficiency of the GO/AgNW electrodes changed less than 3%. Thus, the GO/AgNW electrodes showed enhanced results in terms of resistance and durability compared to conventional transparent electrodes, including ITO-based electrodes.
URI
http://pubs.kist.re.kr/handle/201004/67336
ISSN
2046-2069
Appears in Collections:
KIST Publication > Article
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