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Pasveer, W.F. (author), Bobbert, P.A. (author), Michels, M.A.J. (author), Langeveld-Voss, B.M.W. (author), Schoo, H.F.M. (author), Bastiaansen, J.J.A.M. (author), TNO Industrie (author)
Polymers with a small amount of dye blended in offer an attractive possibility to change the color of the emitted light by changing the dye. We present ab initio calculations within density-functional theory of the HOMO/ LUMO energies for dipyrrolomethane dyes, polyphenylenevinylene and polyfluorene. Special attention is paid to the trends in...
article 2003
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Wijlhuizen, G.J. (author), Graafmans, W.C. (author), Chorus, A.M.J. (author), den Hertog, P.C. (author), Michels, P. (author), Hesemans, L. (author), TNO Preventie en Gezondheid (author)
report 2003
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Huijbregts, L.J. (author), Brom, H.B. (author), Brokken-Zijp, J.C.M. (author), Michels, M.A.J. (author), de Goeje, M.P. (author), Yuan, M. (author), TNO Industrie en Techniek (author)
We show how the dielectric response of powders of semiconducting nanocrystals can be used to extract the intrinsic conductivity of the nanocrystals. The method is applied to powders of nanocrystals of semi-conductive aquocyanophthalocyaninatocobalt (III) (Phthalcon-11), a promising filler material for conducting composites, and published data of...
conference paper 2006
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Huijbregts, L.J. (author), Brom, H.B. (author), Brokken-Zijp, J.C.M. (author), Kemerink, M. (author), Chen, Z. (author), de Goeje, M.P. (author), Yuan, M. (author), Michels, M.A.J. (author), TNO Industrie en Techniek (author)
Phthalcon-11 (aquocyanophthalocyaninatocobalt (III)) forms semiconducting nanocrystals that can be dispersed in epoxy coatings to obtain a semiconducting material with a low percolation threshold. We investigated the structure-conductivity relation in this composite and the deviation from its optimal realization by combining two techniques. The...
article 2006
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van Assche, F.J.H. (author), Rooms, H.C.A. (author), Young, E.W.A. (author), Michels, J. (author), van Mol, A.M.B. (author), Rietjens, G. (author), van de Weijer, P. (author), Bouten, P. (author), TNO Industrie en Techniek (author)
Within the Holst centre a transparent barrier on foil has been under development which is based on low-temperature plasma deposited silicon nitride films as intrinsic moisture barrier, stacked with planarization layers to spatially separate defects in these films. OLED lifetime testing and water vapor transmission rate measurements using a Ca...
conference paper 2008
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Michels, J.J. (author), de Winter, S.H.P.M. (author), Symonds, L.H.G. (author), TNO Industrie en Techniek (author)
We demonstrate that artificial neural network modeling is a viable tool to predict the processing dependence of gravure printed light-emitting polymer layers for flexible OLED lighting applications. The (local) thickness of gravure printed light-emitting polymer (LEP) layers was analyzed using microdensitometry, after which the data was used to...
article 2009
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Ren, M. (author), Gorier, H. (author), Michels, J.J. (author), Andriessen, H.A.J.M. (author), TNO Industrie en Techniek (author)
The roll-to-roll manufacturing process is believed to significantly reduce the cost-price of flexible electronics. Inkjet printing of organic-based inks is a major research topic for flexible electronic applications because of its advantage of non- contact deposition and the ease for patterning for various industrial processes. We herein present...
conference paper 2010
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Michels, J.J. (author)
This paper describes the first example of the application of a combination of the Flory-Huggins and Cahn-Hilliard theories to model and simulate microstructure evolution in solution-processed functional blend layers of organic semiconductors, as used in organic electronics devices. Specifically, the work considers phase separation of the active...
article 2011
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Michels, J.J. (author), van Breemen, A.J.J.M. (author), Usman, K. (author), Gelinck, G.H. (author)
This article describes a combined experimental and theoretical study on nanophase structure development as a result of liquid phase demixing in solution-cast blends of the organic semiconductor poly(9,9'-dioctyl fluorene) (PFO) and the ferroelectric polymer poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-TrFE)). Blend layers (200 nm) are...
article 2011
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Haanstra, J.R. (author), Kerkhoven, E.J. (author), van Tuijl, A. (author), Blits, M. (author), Wurst, M. (author), van Nuland, R. (author), Albert, M-A. (author), Michels, P.A. (author), Bouwman, J. (author), Clayton, C. (author), Westerhoff, H.V. (author), Bakker, B.M. (author)
article 2011
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Ren, M. (author), Gorter, H. (author), Michels, J. (author), Andriessen, R. (author)
Due to its flexibility and ease of patterning, ink jet printing has become a popular technique for the noncontact deposition of liquids, solutions, and melts on a variety of substrates at lateral resolutions down to 10 μm. This article presents a study of ink jet printing of homogeneous layers of Orgacon™ (Agfa-Gevaert, Belgium), a water-based...
article 2011
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Vieyra Salas, J.A. (author), van der Veen, J.M. (author), Michels, J.J. (author), Darhuber, A.A. (author)
We designed and built a highly adaptive and flexible system based on modulated infrared irradiation for the active control of evaporative material deposition suitable for solution processing of organic electronic materials. We performed systematic experiments using thick layers of a high molecular weight aqueous dispersion of poly(3,4-ethylene...
article 2012
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Li, M. (author), Stingelin, N. (author), Michels, J.J. (author), Spijkman, M.-J. (author), Asadi, K. (author), Beerends, R. (author), Biscarini, F. (author), Blom, P.W.M. (author), de Leeuw, D.M. (author)
The processing of solution-based binary blends of the ferroelectric random copolymer poly(vinylidene fluoride-trifluoroethylene) P(VDF-TrFE) and the semiconducting polymer poly(9,9-dioctylfluorenyl-2,7-diyl) (PFO) applied by spin-coating and wire-bar coating is investigated. By systematic variation of blend composition, solvent, and deposition...
article 2012
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Li, M. (author), Stingelin, N. (author), Michels, J.J. (author), Spijkman, M.-J. (author), Asadi, K. (author), Feldman, K. (author), Blom, P.W.M. (author), de Leeuw, D.M. (author)
We have investigated the ferroelectric phase diagram of poly(vinylidene fluoride) (PVDF) and poly(methyl methacrylate) (PMMA). The binary nonequilibrium temperature composition diagram was determined and melting of α- and β-phase PVDF was identified. Ferroelectric β-PVDF:PMMA blend films were made by melting, ice quenching, and subsequent...
article 2012
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Schmidt-Hansberg, B. (author), Sanyal, M. (author), Grossiord, N. (author), Galagan, Y.O. (author), Baunach, M. (author), Klein, M.F.G. (author), Colsmann, A. (author), Scharfer, P. (author), Lemmer, U. (author), Dosch, H. (author), Michels, J.J. (author), Barrena, E. (author), Schabel, W. (author)
The rapidly increasing power conversion efficiencies of organic solar cells are an important prerequisite towards low cost photovoltaic fabricated in high throughput. In this work we suggest indane as a non-halogenated replacement for the commonly used halogenated solvent o-dichlorobenzene. Indane was blended with the higher volatile solvents...
article 2012
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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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Oostra, A.J. (author), van den Bos, K.H.W. (author), Blom, P.W.M. (author), Michels, J.J. (author)
The effect of hypochlorite treatment on the layer thickness and conductivity of a state-of-the-art high conducting poly(3,4- ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is investigated as a function of exposure time and hypochlorite concentration. Because of overoxidation by the hypochlorite the PEDOT:PSS conductivity is...
article 2013
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Mouhib, T. (author), Poleunis, C. (author), Wehbe, N. (author), Michels, J.J. (author), Galagan, Y. (author), Houssiau, L. (author), Bertrand, P. (author), Delcorte, A. (author)
With the recent developments in secondary ion mass spectrometry (SIMS), it is now possible to obtain molecular depth profiles and 3D molecular images of organic thin films, i.e. SIMS depth profiles where the molecular information of the mass spectrum is retained through the sputtering of the sample. Several approaches have been proposed for ...
article 2013
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Kouijzer, S. (author), Michels, J.J. (author), van den Berg, M. (author), Gevaerts, V.S. (author), Turbiez, M. (author), Wienk, M.M. (author), Janssen, R.A.J. (author)
The performance of solution processed polymer:fullerene thin film photovoltaic cells is largely determined by the nanoscopic and mesoscopic morphology of these blends that is formed during the drying of the layer. Although blend morphologies have been studied in detail using a variety of microscopic, spectroscopic, and scattering techniques and...
article 2013
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Andoni, A. (author), Michels, J.J. (author), Kokalari, E. (author), Taraj, K. (author), Como, A. (author)
Some acrylate monomers have been synthesized and copolymerized by means of free radical polymerization with methyl methacrylate and butyl methacrylate. These monomers are known to introduce the desired functionality and tune the properties of the resulting polymer. The synthesized monomers and the polymers have been characterized with NMR...
article 2013
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