Universiteit Hasselt - Knowledge in action


PhD thesis defence of Koen Gilissen

PhD thesis defence of Koen Gilissen

Mar 24, 2016 14.00 uur - 17.00 uur

Universiteit Hasselt

campus Diepenbeek

Agoralaan Gebouw D

3590 Diepenbeek

Lokaal Auditorium H5

Koen Gilissen would like to invite you to the public defence of his doctoral thesis entitled: "Upscaling of organic Light Emitting Devices: a focus on innovative materials, versatile printing techniques and state-of-the-art post-treatments."

Promotor is Prof. dr. Wim Deferme, copromotors is Prof. dr. Jean Manca.


Novel materials and processes are explored to bridge the gap between laboratory scale and industrial scale processing of Organic Light Emitting Diodes (OLEDs). Current laboratory deposition and post-treatment techniques are not well suited for industrial scale processing of OLEDs. These deposition and post-treatment techniques fail to be roll-to-roll compatible and/or are resource hungry. Furthermore, the current ‘defacto standard’ indium-tin-oxide transparent anode needs to be replaced by an indium free alternative. Microwave annealing of these organic (OLED) materials is investigated as alternative post-deposition annealing treatment. Ultrasonic spray coating is studied as deposition technique of the active layer in OLEDs. Boron doped Nano Crystalline Diamond with an embedded gold grid (BNCD:Au-grid) is explored as transparent anode for OLEDs.  The results show that microwave annealing is a faster post-deposition annealing technique while preserving the electronic properties of these organic materials. It is also shown that ultrasonic spray coating is a viable roll-to-roll compatible deposition technique for the active layer of OLEDs. The indium – free BNCD:Au-grid anode shows comparable efficacies and an enhanced luminous flux compared to the reference ITO based OLED.