Arnold Kell - Versatile Molecular Silver Ink Platforms for Printed Electronics

Session 19: Conductors

Versatile Molecular Silver Ink Platforms for Printed Electronics
Thursday, February 15, 2018
2:05 PM - 2:25 PM

Silver-based conductive molecular inks compatible with screen printing will be presented that offer an alternative to traditional flake-based inks. These unique inks can be processed with thermal or photonic energy to produce traces with resistivities as low as 3 times bulk silver conductivity and sub-micron thicknesses, enabling the resolution of traces as narrow as 42 μm separated by 38 μm. In addition, the resulting traces are mechanically robust to both flexing and creasing and stable against ion migration. We will also demonstrate that this molecular ink can be easily reformulated to enable aerosol jet, plotter-based and inkjet printing, the latter of which can be used to produce source/drain and gate electrode for high mobility, all-printed transistors on flexible substrates. The inks also demonstrate potential for stretchable and in-mold electronics applications where traces printed on stretchable substrates remain conductive up to strains as high as 126% and can be thermoformed to generate conductive 3D traces. The development of these new functional inks should provide a viable alternative to flake inks for emerging application areas such as in-mold electronics and high resolution antenna and transparent conductive electrodes for displays.

Speaker's Biography

Dr. Arnold Kell studied chemistry at the McMaster University in Hamilton, Ontario (BSc 1999) and The University of Western Ontario in London, Ontario (PhD 2004). He has 12 years of R&D experience at National Research Council Canada where he previously developed nanomaterials for biodiagnostic applications. He is currently the Technical Leader of molecular silver ink activities within the Printable Electronics program. Specifically, the focus of program is to develop molecular ink platforms that can be incorporated into scalable printing processes in order to enhance the performance of all-printed devices including a transistors, RF circuits and antennae. In addition, recent efforts are focused on the development of inks that can be utilized in stretchable and structural/in-mold electronics.


Arnold Kell
Senior Research Officer
National Research Council Canada