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Eggenhuisen, T.M. (author), Coenen, M.J.J. (author), Slaats, M.W.L. (author), Groen, W.A. (author)The transfer of laboratory scale solution processing of organic electronics to large area roll-to-roll production requires the use of up-scalable deposition techniques. Furthermore, industrial production demands the omission of halogenated and other harmful solvents. Here, the authors discuss large area inkjet printing using industrial...article 2014
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Khanbareh, H. (author), van der Zwaag, S. (author), Groen, W.A. (author)Functional granular composites of lead titanate particles in an epoxy matrix prepared by dielectrophoresis show enhanced dielectric, piezoelectric and pyroelectric properties compared to 0-3 composites for different ceramic volume content from 10% to 50%. Two structuring parameters, the interparticle distance and the percentage of 1-3...article 2014
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Khanbareh, H. (author), van der Zwaag, S. (author), Groen, W.A. (author)Polymer-ceramic composites with pyroelectric sensitivity are presented as promising candidates for infrared detection. Selection of the appropriate ceramic filler and the polymer matrix is one of the key parameters in the development of optimized materials for specific applications. In this work lead-titanate (PT) ceramic is incorporated into a...conference paper 2014
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- de Vries, I.G. (author), Groen, W.A. (author) article 2014
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van den Ende, D.A. (author), Hendriks, R. (author), Cauchois, R. (author), Groen, W.A. (author)In this work photonic energy from a high power xenon flash lamp is used for soldering thin chips on polyimide and polyester foil substrates using standard Sn-Ag-Cu lead free alloys. The absorption of the xenon light pulse leads to rapid heating of components and tracks up to temperatures above the solder melting temperature, while the...article 2014
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van der Zwaag, S. (author), van der Ende, D.A. (author), Groen, W.A. (author)This chapter describes the development and properties of novel functional composite materials consisting of aligned piezo-ceramic particles or fibers in a polymeric matrix, which can be fully integrated in thermoset or thermoplastic products. The materials have a low potential for applications requiring actuation but have attractive sensorial...bookPart 2014
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Galagan, Y. (author), Shanmugam, S. (author), Teunissen, J.P. (author), Eggenhuisen, T.M. (author), Biezemans, A.F.K.V. (author), Van Gijseghem, T. (author), Groen, W.A. (author), Andriessen, R. (author)Solution processing of the electrodes is a big challenge towards scaling up and R2R processing of organic solar cells. Inkjet printing is a non-contact printing method, it can be realized by solution processing at ambient condition and provides freedom of shape in the electrode pattern. The inkjet and screen printing of the back electrode in...article 2014
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van den Ende, D.A. (author), Hendriks, R. (author), Cauchois, R. (author), Kusters, R.H.L. (author), Cauwe, M. (author), Groen, W.A. (author), van den Brand, J. (author)Ultrathin bare die chips and small-size surface mount device components were successfully soldered using a novel roll-to-roll compatible soldering technology. A high-power xenon light flash was used to successfully solder the components to copper tracks on polyimide (PI) and polyethylene terephthalate (PET) flex foils by using a lead-free solder...article 2014
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James, N.K. (author), Lafont, U. (author), van der Zwaag, S. (author), Groen, W.A. (author)Piezoelectric ceramic-polymer composites with 0-3 connectivity were fabricated using lead zirconium titanate (PZT) powder dispersed in an ionomer (Zn ionomer) and its reference ethylene methacrylic acid copolymer (EMAA) polymer matrix. The PZT-Zn ionomer and PZT-EMAA composites were prepared by melt extrusion followed by hot pressing. The...article 2014
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van de Wiel, H.J. (author), Galagan, Y. (author), Van Lammeren, T.J. (author), De Riet, J.F.J. (author), Gilot, J. (author), Nagelkerke, M.G.M. (author), Lelieveld, R.H.C.A.T. (author), Shanmugam, S. (author), Pagudala, A. (author), Hui, D. (author), Groen, W.A. (author)Highly conductive screen printed metallic (silver) structures (current collecting grids) combined with poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) are a viable replacement for indium tin oxide (ITO) and inkjet printed silver as transparent electrode materials. To provide successful integration into organic photovoltaic ...article 2013
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Gorter, H. (author), Coenen, M.J.J. (author), Slaats, M.W.L. (author), Ren, M. (author), Lu, W. (author), Kuijpers, C.J. (author), Groen, W.A. (author)Thermal evaporation is the current standard for the manufacture of small molecule organic light emitting diodes (smOLEDs), but it requires vacuum process, complicated shadow masks and is inefficient in material utilization, resulting in high cost of ownership. As an alternative, wet solution deposition can provide significant cost savings by...article 2013
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van der Ende, D.A. (author), Groen, W.A. (author), van der Zwaag, S. (author)High-strain environments, such as are found in automobile tires, provide deformation energy that can be harvested using piezoelectric materials, for instance, for powering electronics such as wireless sensors. Despite numerous efforts, none of the present devices easily satisfy the stringent operating and lifetime requirements for use inside a...article 2013
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James, N.K. (author), van den Ende, D.A. (author), Lafont, U. (author), van der Zwaag, S. (author), Groen, W.A. (author)Structured lead zirconium titanate (PZT)-epoxy composites are prepared by dielectrophoresis. The piezoelectric and dielectric properties of the composites as a function of PZT volume fraction are investigated and compared with the corresponding unstructured composites. The effect of poling voltage on piezoelectric properties of the composites is...article 2013
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van den Ende, D.A. (author), Fischer, H.R. (author), Groen, W.A. (author), van der Zwaag, S. (author)The meso-scale surface roughness of piezoelectric fiber composites can be manipulated by applying an electric field to a piezocomposite with a polished surface. In the absence of an applied voltage, the tips of the embedded piezoelectric ceramic fibers are below the surface of the piezocomposite and a silicon wafer counter surface rests solely...article 2013
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van den Ende, D.A. (author), Maier, R.A. (author), van Neer, P.L.M.J. (author), van der Zwaag, S. (author), Randall, C.A. (author), Groen, W.A. (author)In this work, the piezoelectric properties at high electric fields of dielectrophoretically aligned PZT - polymer composites containing high aspect ratio particles (such as short fibers) are presented. Polarization and strain as a function of electric field are evaluated. The properties of the composites are compared to those of PZT-polymer...article 2013
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van den Ende, D.A. (author), van de Wiel, H.J. (author), Groen, W.A. (author), van der Zwaag, S. (author)Direct piezoelectric strain energy harvesting can be used to power wireless autonomous sensors in environments where low frequency, high strains are present, such as in automobile tires during operation. However, these high strains place stringent demands on the materials with respect to mechanical failure or depolarization, especially at...article 2012
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Abbel, R.J. (author), van Lammeren, T.J. (author), Hendriks, R. (author), Ploegmakers, J.J. (author), Rubingh, J.E.J.M. (author), Meinders, E.R. (author), Groen, W.A. (author), Holst Centre/TNO, High Tech Campus 31, P.O. Box 8550, 5605 KN Eindhoven, Netherlands (author)Silver nanoparticle inks printed on temperature-sensitive substrates can be converted into structures with high electrical conductivities within fractions of a second by photonic flash sintering. The key principle is the selective heating of the ink by the absorption of strongly focused pulsed light for which the substrate is transparent. The...article 2012
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Mikkenie, R. (author), Steigelmann, O. (author), Groen, W.A. (author), ten Elshof, J.E. (author)The effect of Y2O3 concentration on the dielectric properties of ceramic disc capacitors and multilayer capacitors containing 50 dielectric layers with an approximate thickness of 3µm were investigated. The relative permittivity and temperature coefficient of capacity of multilayer capacitors at low and high applied field suggest that two types...article 2012
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van den Ende, D.A. (author), van Kempen, S.E. (author), Wu, X. (author), Groen, W.A. (author), Randall, C.A. (author), van der Zwaag, S. (author)Piezoelectric composites were prepared by dielectrophoretic alignment of high aspect ratio piezoelectric particles in a thermosetting polymer matrix. A high level of alignment was achieved in the cured composite from a resin containing randomly oriented high aspect ratio particles. Upon application of an electric field during curing of the resin...article 2012
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van den Ende, D.A. (author), Groen, W.A. (author), van der Zwaag, S. (author)We report on the optimisation of a recently developed high performance 0-3 piezoelectric composite comprising of the piezoelectric Lead Zirconate Titanate (PZT) powder and a liquid crystalline thermosetting matrix polymer (LCT). The matrix polymer is a liquid crystalline polymer comprising of an HBA-HNA backbone with phenylethynyl end-groups....article 2011