KSC SEMINARS
Eindhoven University of Technology
Date & Time: Monday December 4th at 3.30pm
Venue: Auditorium between Bldg.4/5
Light refreshments will be provided.
Abstract: Organic semiconductors continue to attract interest for application in organic optoelectronic devices. For solar cells, the organic semiconductors have to fulfil several chemical, optical electronic, and morphological requirements to provide high power conversion efficiencies in solar light. The chemical structure, molecular weight, processing conditions, charge transport layers and device architectures all exert important roles to reach the intrinsic limits of these materials. Recent progress in the field of donor and acceptor polymers and molecules will be discussed, resulting in high efficiencies as consequence of controlling chemical structure and length scales of phase separation. Furthermore results on multi-junction polymer solar cells will be presented. We have been able to develop new semiconductor inks for the interconnection layers that allow versatile stacking of a large number of different photoactive layers combinations in tandem and triple junction cells, providing efficiencies up to 10%.
I will also briefly address our recent work on perovskite solar cells where we have been developing and investigating device architectures for reproducible and efficient solar cells.
Biography: René Janssen is University Professor at the Eindhoven University of Technology (TU/e) in the Departments of Chemical Engineering and Chemistry and Applied Physics. He received his Ph.D. in 1987 from the TU/e for a thesis on electron spin resonance and quantum chemical calculations of organic radicals in single crystals. René Janssen has been visiting professor at the University of California Santa Barbara, the University of Angers, and the University of Florida. In 2000 he was co-recipient of the René Descartes Prize from the European Commission for outstanding collaborative research and in 2010 he received the Research Prize of The Royal Institute of Engineers in The Netherlands for his work on Materials for Sustainable Energy. In 2015 René Janssen received the Spinoza Prize of Netherlands Organisation for Scientific Research. He currently serves as editor of “Organic Electronics”.The research of his group focuses on functional p-conjugated molecules, macromolecules, nanostructures, and materials that may find application in advanced technological applications. Synthetic organic and polymer chemistry are combined with time-resolved optical spectroscopy, electrochemistry, morphological characterization and the preparation of prototype devices to accomplish these goals. In recent years many of the activities have concentrated on organic and hybrid solar cells.