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Abbel, R.J. (author), van de Peppel, L. (author), Kirchner, G. (author), Michels, J.J. (author), Groen, P. (author), Holst Centre-TNO, Eindhoven, Netherlands Max Plack Institut für Polymerenforschung, Mainz, Germany Delft University of Technology, Faculty of Aerospace Engineering, Delft, The Netherlands (author)
Operational lifetime is a critical performance parameter of organic electronic devices and can be cut short by multiple degradation mechanisms. One supposed cause is metal migration between the electrodes, which, however, is difficult to study independently of other failure modes. We present a setup, which excludes such competing processes and...
article 2017
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van de Weijer, P. (author), Bouten, P.C.P. (author), Unnikrishnan, S. (author), Akkerman, H.B. (author), Michels, J.J. (author), van Mol, T.M.B. (author)
Organic light-emitting diodes degrade rapidly by means of local cathode oxidation when exposed to the ambient atmosphere, resulting in visible non-emissive areas called black spots. High performance inorganic based encapsulations are required to protect the OLED. We have applied a hybrid thin-film encapsulation stack consisting of two inorganic...
article 2017
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Oostra, A.J. (author), Reddy, A. (author), Smits, E.C.P. (author), Abbel, R.J. (author), Groen, W.A. (author), Blom, P.W.M. (author), Michels, J.J. (author)
A method is presented to self-repair cracks in embedded silver grid structures used in large area organic electronics. The repair procedure is based on electro-deposition, incited by the application of a moderate DC voltage across the crack. During this process the organic anode that is in direct electrical contact with the silver grid,...
article 2016
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Pilet, N. (author), Khikhlovskyi, V. (author), van Breemen, A.J.J.M. (author), Michels, J.J. (author), Kemerink, M. (author), Gelinck, G. (author), Warnicke, P. (author), Bernard, L. (author)
Organic electronics is becoming more and more important because the low level of fabrication and deposition complexity even at large scale makes it a good candidate for future low cost technological product development. P(VDF-TrFE) is a co-polymer of special interest due its ferroelectric property enabling usage in re-programmable non-volatile...
article 2016
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Oostra, A.J. (author), Smits, E.C.P. (author), de Leeuw, D.M. (author), Blom, P.W.M. (author), Michels, J.J. (author)
The operational characteristics of organic solar cells manufactured with large area processing methods suffers from the occurrence of short-circuits due to defects in the photoactive thin film stack. In this work we study the effect of a shunt resistance on an organic solar cell and demonstrate that device performance is not affected negatively...
article 2015
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Schaefer, C. (author), van der Schoot, P. (author), Michels, J.J. (author)
The morphology of solution-cast, phase-separated polymers becomes finer with increasing solvent evaporation rate. We address this observation theoretically for a model polymer where demixing is induced by steady solvent evaporation. In contrast to what is the case for a classical, thermal quench involving immiscible blends, the spinodal...
article 2015
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Abbel, R. (author), Teunissen, P. (author), Michels, J. (author), Groen, W.A. (author)
Inkjet printed silver lines contract to widths below 20-μm during drying on an organic planarization coating. Aspect ratios previously unprecedented with single pass inkjet printing on isotropic homogeneous substrates are obtained. This effect is caused by the subsequent evaporation of solvents from the ink, which results in a continuous...
article 2015
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Oostra, A.J. (author), Blom, P.W.M. (author), Michels, J.J. (author)
Defects occurring during printing of the photoactive layer in organic solar cells lead to short-circuits due to direct contact between the PEDOT:PSS anode and metallic cathode. We provide a highly effective repair method where the defected zone with bare PEDOT:PSS is treated with aqueous sodium hypochlorite to locally disrupt the conductivity of...
article 2015
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Huijbrechts, B. (author), Velikovaa, M. (author), Michels, S. (author), Scheepens, R. (author)
Deliver “actionable” intelligence instead of just raw information – this is what the Metis research project pursues for supporting operational work in domains characterized by constantly evolving situations with a diversity of entities, complex interactions and high-level uncertainty in the information gathered. Operating effectively in such...
article 2015
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van Breemen, A.J.J.M. (author), Zaba, T. (author), Khikhlovskyi, V. (author), Michels, J. (author), Janssen, R. (author), Kemerink, M. (author), Gelinck, G. (author)
The polymer phase separation of P(VDF-TrFE):F8BT blends is studied in detail. Its morphology is key to the operation and performance of memory diodes. In this study, it is demonstrated that it is possible to direct the semiconducting domains of a phase-separating mixture of P(VDF-TrFE) and F8BT in a thin film into a highly ordered 2D lattice by...
article 2015
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Michels, S. (author), Hommersom, A. (author), Lucas, P.J.F. (author), Velikova, M. (author)
Abstract Probabilistic logics combine the expressive power of logic with the ability to reason with uncertainty. Several probabilistic logic languages have been proposed in the past, each of them with their own features. We focus on a class of probabilistic logic based on Sato's distribution semantics, which extends logic programming with...
article 2015
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Perrotta, A. (author), García, S.J. (author), Michels, J.J. (author), Andringa, A.M. (author), Creatore, M. (author)
Water permeation in inorganic moisture permeation barriers occurs through macroscale defects/pinholes and nanopores, the latter with size approaching the water kinetic diameter (0.27 nm). Both permeation paths can be identified by the calcium test, i.e., a time-consuming and expensive optical method for determining the water vapor transmission...
article 2015
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Khikhlovskyi, V. (author), van Breemen, A.J.J.M. (author), Michels, J.J. (author), Janssen, R.A.J. (author), Gelinck, G.H. (author), Kemerink, M. (author)
In many organic electronic devices functionality is achieved by blending two or more materials, typically polymers or molecules, with distinctly different optical or electrical properties in a single film. The local scale morphology of such blends is vital for the device performance. Here, a simple approach to study the full 3D morphology of...
article 2015
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Jolt Oostra, A. (author), Blom, P.W.M. (author), Michels, J.J. (author)
Pinholes in the emitting layer of an organic light emitting diode (OLED), e.g. induced by particle contamination or processing flaws, lead to direct contact between the hole-injection layer (HIL) and the cathode. The resulting short circuits give rise to catastrophic device failure. We demonstrate that these short circuits can be effectively...
article 2014
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Van Assche, F.J.H. (author), Unnikrishnan, S. (author), Michels, J.J. (author), van Mol, A.M.B. (author), van de Weijer, P. (author), van de Sanden, M.C.M. (author), Creatore, M. (author)
We report on a low substrate temperature (110°C) remote microwave plasma-enhanced chemical vapor deposition (PECVD) process of silicon nitride barrier layers against moisture permeation for organic light emitting diodes (OLEDs) and other moisture sensitive devices such as organic photovoltaic cells (OPVs). Specifically, the influence of the SiH4...
article 2014
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Michels, S. (author), Velikova, M. (author), Huijbrechts, B. (author), Novak, P. (author), Hoeksma, J. (author), Scheepens, R. (author), Laarhuis, J. (author), Bonhof, A. (author)
article 2014
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Teunissen, P. (author), Abbel, R.J. (author), Michels, J.J. (author), Groen, P. (author)
Electrically conductive structures comprising both narrow line widths and high aspect ratios are indispensable components of many electronic devices. Producing them reliably on an industrial scale by inkjet printing of metal-based inks is a serious challenge. Firstly, due to spreading of the ink on the substrate, widths of 30 microns are...
conference paper 2014
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Velikova, M. (author), Novák, P. (author), Huijbrechts, B. (author), Laarhuis, J. (author), Hoeksma, J. (author), Michels, S. (author)
Nowadays the maritime operational picture is characterised by a growing number of entities whose interactions and activities are constantly changing. To provide timely support in this dynamic environment, automated systems need to be equipped with tools— lacking in existing systems—for real-time prioritisation of the application tasks (missions)...
article 2014
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Michels, J.J. (author), Peter, M. (author), Salem, A. (author), van Remoortere, B. (author), van den Brand, J. (author)
This paper presents a thorough experimental and theoretical analysis of a model system for the mechanism of cathode degradation in OLED and OPV devices due to lateral side ingress of water vapour into laminated thin film barrier structures. The experimental procedure allows for full quantitative control over layer dimensions of the laminate, as...
article 2014
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Michels, J.J. (author), Moons, E. (author)
The formation of the surface-induced stratified lamellar composition profile experimentally evidenced in spincoated layers of the photovoltaic donor-acceptor blend consisting of poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-5,5- (4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole]/ phenyl-C61-butyric acid methyl ester (APFO-3/PCBM), as processed from...
article 2013
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