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Park, Jang-Ung
Flexible Nano-electronics & Biotechnology Lab
Research Interests
  • Wireless wearable electronics, flexible electronics, printed electronics, nano-bio interfaces

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Newly Designed Cu/Cu10Sn3 Core/Shell Nanoparticles for Liquid Phase-Photonic Sintered Copper Electrodes: Large-Area, Low-Cost Transparent Flexible Electronics

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Title
Newly Designed Cu/Cu10Sn3 Core/Shell Nanoparticles for Liquid Phase-Photonic Sintered Copper Electrodes: Large-Area, Low-Cost Transparent Flexible Electronics
Author
Oh, Sang-JinKim, Tae GonKim, So-YunJo, YejinLee, Sun SookKim, KukjooRyu, Beyong-HwanPark, Jang-UngChoi, YoungminJeong, Sunho
Keywords
Conductive materials; Copper; Cost effectiveness; Flexible electronics; Nanoparticles; Sintering; Synthesis (chemical); Tin; Touch screens Conductive electrodes; Core/shell nanoparticles; Cu-based electrodes; Electrode fabrication; Electrode material; Polyethylene naphthalate; Printing techniques; Wireless power transmission
Issue Date
201607
Publisher
AMER CHEMICAL SOC
Citation
CHEMISTRY OF MATERIALS, v.28, no.13, pp.4714 - 4723
Abstract
The conductive nanomaterials applicable to unconventional printing techniques have attracted a great deal of attention, and in particular, cost-effective copper-based electrode materials have been recognized as viable candidates for replacement of the expensive silver counterpart. In this study, we synthesize newly designed Cu/Cu10Sn3 core/shell nanoparticles, as an additive material for overcoming the critical drawbacks in Cu nanoparticle-based electrodes, in combination with a large-area processable, continuous photonic sintering process on a time scale of 10-3 s. By virtue of the low-melting point nature of the Cu10Sn3 phase, the facile electrode fabrication process is easily triggered, yielding resistivities of 27.8 and 12.2 μω cm under energy dose conditions of 0.97 and 1.1 J/cm2, respectively, at which highly conductive electrodes cannot be obtained from phase-pure Cu nanoparticles. The suspension mixture of Cu and Cu/Cu10Sn3 nanoparticles permits roll-to-roll processable, highly uniform Cu-based electrodes (with a sheet resistance and a standard deviation of 1.21 and 0.29 ω/square, respectively) even on vulnerable polyethylene naphthalate substrate, while the electrodes derived from Cu10Sn3 phase-free Cu nanoparticles suffer from nonuniform characteristics and even a partially insulating nature. The practical applicability of Cu/Cu10Sn3 core/shell nanoparticles is demonstrated with the fabrication of a touch screen panel and an antenna for wireless power transmission.
URI
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DOI
http://dx.doi.org/10.1021/acs.chemmater.6b01709
ISSN
0897-4756
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