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Novel Synthesis, Coating, and Networking of Curved Copper Nanowires for Flexible Transparent Conductive Electrodes
Author(s) -
Yin Zhenxing,
Song Seung Keun,
You DuckJae,
Ko Yeongun,
Cho Sanghun,
Yoo Jeeyoung,
Park Si Yun,
Piao Yuanzhe,
Chang Suk Tai,
Kim Youn Sang
Publication year - 2015
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201500855
Subject(s) - materials science , coating , nanowire , electrode , polyethylene terephthalate , annealing (glass) , composite material , thin film , electrical conductor , substrate (aquarium) , chemical engineering , nanotechnology , chemistry , oceanography , geology , engineering
In this work, a whole manufacturing process of the curved copper nanowires (CCNs) based flexible transparent conductive electrode (FTCE) is reported with all solution processes, including synthesis, coating, and networking. The CCNs with high purity and good quality are designed and synthesized by a binary polyol coreduction method. In this reaction, volume ratio and reaction time are the significant factors for the successful synthesis. These nanowires have an average 50 nm in width and 25–40 μm range in length with curved structure and high softness. Furthermore, a meniscus‐dragging deposition (MDD) method is used to uniformly coat the well‐dispersed CCNs on the glass or polyethylene terephthalate substrate with a simple process. The optoelectrical property of the CCNs thin films is precisely controlled by applying the MDD method. The FTCE is fabricated by networking of CCNs using solvent‐dipped annealing method with vacuum‐free, transfer‐free, and low‐temperature conditions. To remove the natural oxide layer, the CCNs thin films are reduced by glycerol or NaBH 4 solution at low temperature. As a highly robust FTCE, the CCNs thin film exhibits excellent optoelectrical performance ( T = 86.62%, R s = 99.14 Ω −1 ), flexibility, and durability ( R / R 0 < 1.05 at 2000 bending, 5 mm of bending radius).