Water-Soluble Copper Ink for the Inkjet Fabrication of Flexible Electronic Components

Area of Science:

• Materials Science
• Chemistry
• Electrical Engineering

Background:

• Printed electronics require conductive inks for fabricating circuits.
• Traditional inks often use metal nanoparticles, which can be costly or unstable.
• Developing alternative precursors for conductive inks is crucial for advancing printed electronics.

Purpose of the Study:

• To prepare and investigate copper conductive paths using functional inks based on copper-containing complex compounds.
• To explore solutions-based copper precursors as an alternative to metal nanoparticle dispersions.
• To identify the most suitable copper precursor for forming high-quality conductive layers via printing.

Main Methods:

• Synthesis of copper-containing complex compounds for ink formulation.
• Thermogravimetry (TGA) in an argon atmosphere to study precursor thermal characteristics.
• X-ray diffraction (XRD) for structural analysis.
• Wettability tests, printing on flexible substrates, and electrical measurements to evaluate performance.

Main Results:

• Dimethylamine complex of copper formate was identified as a superior precursor due to its decomposition temperature.
• The synthesized precursor enabled the formation of copper layers through printing.
• Characterization confirmed the structure and performance of the printed copper conductive paths.

Conclusions:

• Copper formate complexes offer a promising alternative to nanoparticle-based inks for printed electronics.
• The dimethylamine complex of copper formate is a suitable precursor for fabricating conductive copper paths.
• This approach facilitates the development of printed electronic devices with enhanced performance and potentially lower costs.