Printing Technologies for OLED Lighting Applications

Peter Kruijt is a mechanical engineer with a PhD in polymer processing and Rheology from the Eindhoven University of Technology. Before joining the Holst Centre he has worked on nozzle failure detection of piezo printheads, media conditioning and media handling (roll to sheet), all for wide format (graphical) inkjet printing systems.

 

At the Holst Centre he works on inkjet printing of PEDOT inks, Light Emitting Polymer inks and Organic Photovoltaic inks for large pixels. The goal is to print free standing pixels with dimensions in the centimeter range, with a homogeneous light output over the area. Therefore, thickness variations should be limited to approximately 2%. The most important ways to influence the thickness distribution are print strategy and solvent system (the drying behaviour of the wet layer). The research therefore focuses on the interaction between ink and substrate, as well as the interactions between inks.

Holst Centre is an independent centre for open innovation that develops generic technologies and technology platforms for wireless autonomous transducer solutions and systems-in-foil. It is founded in 2005 by the research organizations IMEC and TNO. A key feature is interaction and cooperation with industry and academia. It is this kind of cross-fertilization that enables Holst Centre to tune its scientific strategy to industrial needs.