Exploring cyclic olefin copolymer (COC) for flexible silver nanowire electrode

Area of Science:

• Materials Science
• Nanotechnology
• Flexible Electronics

Background:

• Flexible electronic devices require robust transparent conductive films.
• Achieving stable silver nanowire (Ag NW) coatings on polymer substrates like cyclic olefin copolymer (COC) is challenging.
• Existing methods often involve complex pre- and post-treatment processes.

Purpose of the Study:

• To present a novel, simple, and environmentally friendly method for directly coating Ag NWs on COC substrates.
• To improve the adhesion and optoelectrical performance of Ag NWs on COC.
• To demonstrate the potential of Ag NW/COC electrodes for flexible electronics.

Main Methods:

• Direct coating of Ag NWs on COC substrates using ultraviolet/ozone (UVO) treatment.
• Characterization of optoelectrical properties (optical transmittance, sheet resistance).
• Evaluation of mechanical stability through tape adhesion and film bending tests.

Main Results:

• Successful direct coating of Ag NWs on COC via UVO treatment, a novel approach for this material system.
• Ag NWs/COC electrodes achieved 84% optical transmittance and 13 Ω/sq sheet resistance.
• Electrodes exhibited excellent mechanical stability with no change in sheet resistance after adhesion and bending tests.

Conclusions:

• The UVO treatment provides a straightforward and eco-friendly method for fabricating high-performance Ag NW/COC electrodes.
• The developed Ag NW-COC system demonstrates excellent optoelectrical and mechanical properties, suitable for flexible electronics.
• This advancement facilitates the commercialization of flexible electronics for biocompatible and wearable applications.