Cu Electrode Fabrication by Acid-assisted Laser Processing of Cu Nanoparticles and Application with Transparent·Flexible Electrode

구리 나노 입자에 산-보조 레이저 공정을 적용한 구리 전극 제작 공정 개발 및 투명·유연 전극으로 활용

Copper is a promising electronic material due to low cost and high electrical conductivity. However, the oxidation problem in an ambient condition makes a crucial issue in practical applications. In here, we developed a simple and cost-effective Cu patterning method on a flexible PET film by combining a solution processable Cu nanoparticle patterning and a low temperature post-processing using acetic acid treatment, laser sintering process and acid-assisted laser sintering process. Acid-assisted laser sintering processed Cu electrode showed superior characteristics in electrical, mechanical and chemical stability over other post-processing methods. Finally, the Cu electrode was applied to the flexible electronics applications such as flexible and transparent heaters and touch screen panels.