期刊
APPLIED SURFACE SCIENCE
卷 570, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2021.151179
关键词
Copper oxide nanoparticle ink; Laser digital patterning; flexible Cu electrodes; Laser reductive sintering; Finely-structured electrodes; Transparent touchscreen panel
类别
资金
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea [20194030202440]
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2021R1A2C2004109]
- National Research Foundation of Korea [2021R1A2C2004109] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A facile method for synthesizing CuOx nanoparticles ink was presented to fabricate high-quality CuOx thin films with finely-structured Cu electrodes on polymer substrates. Laser-induced reductive sintering process was utilized to achieve low resistivity and transparent conducting panels with high transmittance. Superior electromechanical stability of Cu electrodes and long-term oxidation resistance were confirmed, demonstrating the potential application of Cu-based flexible transparent touchscreen panels.
We present a facile and simple method for synthesizing a large-scale, well-dispersed, and high-concentration CuOx nanoparticle (NP) ink. CuOx thin films with ultrafine surfaces were fabricated using the synthesized NP ink by spin coating, which cannot be achieved using commercial NPs. The CuOx NP thin films were subjected to a subsequent laser digital patterning process, yielding finely-structured Cu electrodes on various polymer substrates with the minimum resistivity of 10.5 mu Omega cm due to the laser-induced reductive sintering (LRS) phenomenon. Arbitrary Cu electrode patterns were directly generated on various flexible substrates under ambient conditions without any templating process. Cu-grid transparent conducting panels with a low sheet resistance (8.45 Omega sq(-1)) and high transmittance (87.4% at 550 nm) were prepared. Furthermore, the effect of the amount of polyvinylpyrrolidone, which was used as a dispersing and reducing agent in the NP ink, on the LRS phenomenon was analyzed in detail. Mechanical bending and twisting, cyclic bending, and tape pull tests confirmed the superior electromechanical stability of the Cu electrodes. The long-term oxidation resistance of the Cu electrodes under ambient conditions and the limiting temperature of oxidation resistance were also examined. Finally, a Cubased flexible transparent touchscreen panel was demonstrated as a possible application.
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