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Le Duc Anh Ho,Hojun Kim(김호준),Vu Binh Nam,Daeho Lee(이대호) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
We present a facile method for synthesizing a large-scale, well-dispersed copper oxide (CuO<SUB>x</SUB>) nanoparticle (NP) ink. The uniform CuO<SUB>x</SUB> thin films prepared using the synthesized NP ink by spin coating were applied to a laser digital patterning process, obtaining finely-structured Cu electrodes with the low resistivity of 10.5 μΩ cm. By controlling the software embedded in the laser scanning system, Cu-grid with a low sheet resistance (8.45 Ω·sq<SUP>−1</SUP>) and high transmittance (87.4% at 550 nm) were achieved. Furthermore, the effect of polyvinylpyrrolidone ratio, which was used as a dispersing agent in the NP ink and a reducing agent in the laser process, was carefully examined in detail. The superior stability of the Cu electrodes on the substrates was confirmed using various tests including bending and twisting, cyclic bending, and tape pull tests. Finally, a flexible transparent touchscreen panel based on Cu electrodes was fabricated to demonstrate a possible application.