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- Laveaux, M. (author), Wesselink, W. (author), Willemse, T.A.C. (author) conference paper 2022
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Peternella, F.G. (author), Harmsma, P.J. (author), Horsten, R.C. (author), Zuidwijk, T. (author), Urbach, H.P. (author), Adam, A.J.L. (author)A new method for fast, high resolution interrogation of an array of photonic sensors is proposed. The technique is based on the integrated Fourier transform (FT) interrogator previously introduced by the authors. Compared to other interferometric interrogators, the FT-interrogator is very compact and has an unprecedented tolerance to variations...article 2021
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Peternella, F.G. (author), Esselink, T. (author), Dorsman, B. (author), Harmsma, P.J. (author), Horsten, R.C. (author), Zuidwijk, T. (author), Urbach, H.P. (author), Adam, A.L.C. (author)In this paper, the design and the characterization of a novel interrogator based on integrated Fourier transform (FT) spectroscopy is presented. To the best of our knowledge, this is the first integrated FT spectrometer used for the interrogation of photonic sensors. It consists of a planar spatial heterodyne spectrometer, which is implemented...article 2019
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di Giacomo, F.D. (author), Fledderus, H. (author), Gorter, H. (author), Kirchner, G. (author), Vries, I.D. (author), Dogan, I. (author), Verhees, W. (author), Zardetto, V. (author), Najafi, M. (author), Zhang, D. (author), Lifka, H. (author), Galagan, Y. (author), Aernouts, T. (author), Veenstra, S. (author), Groen, P. (author), Andriesse, R. (author)The industrialization of perovskite solar cells (PSC) require processes to efficiently deposit the constituent layers over large areas. In this work we optimized the use of slot die coating process for both sheet-to-sheet (S2S) and roll-to-roll (R2R) manufacturing. Particular focus have been put on the control of the uniformity of perovskite...conference paper 2018
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van de Ruit, K. (author), Cohen, R.I. (author), Bollen, D. (author), van Mol, T. (author), Yerushalmi-Rozen, R. (author), Janssen, R.A.J. (author), Kemerink, M. (author)The mechanism and magnitude of the in-plane conductivity of poly(3,4-ethy-lenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) thin films is determined using temperature dependent conductivity measurements for various PEDOT:PSS weight ratios with and without a high boiling solvent (HBS). Without the HBS the in-plane conductivity of PEDOT:PSS...article 2013
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van de Ruit, K. (author), Katsouras, I. (author), Bollen, D. (author), Van Mol, T. (author), Janssen, R.A.J. (author), de Leeuw, D.M. (author), Kemerink, M. (author)For its application as transparent conductor in light-emitting diodes and photovoltaic cells, both the in-plane and out-of-plane conductivity of PEDOT:PSS are important. However, studies into the conductivity of PEDOT:PSS rarely address the out-of-plane conductivity and those that do, report widely varying results. Here a systematic study of the...article 2013
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Kotlarski, J.D. (author), Moet, D.J.D. (author), Blom, P.W.M. (author)Lowering of the optical band gap of conjugated polymers in bulk heterojunction solar cells not only leads to an increased absorption but also to an increase of the optimal active layer thickness due to interference effects at longer wavelengths. The increased carrier densities due to the enhanced absorption and thicker active layers make low...article 2011
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Lu, M. (author), Nicolai, H.T. (author), Wetzelaer, G.-J.A.H. (author), Blom, P.W.M. (author)N-type doping of poly(2-methoxy-5-(2′-ethyl-hexyloxy)-p-phenylene vinylene) (MEH-PPV) with decamethylcobaltocene (DMC) strongly improves the electron transport due to filling of the electron traps. Unexpectedly, the n-type doping simultaneously suppresses the hole transport in MEH-PPV. We demonstrate that this strong reduction of the hole...article 2011
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Lu, M. (author), Nicolai, H.T. (author), Kuik, M. (author), Wetzelaer, G.-J.A.H. (author), Wildeman, J. (author), Palmaerts, A. (author), Blom, P.W.M. (author)We demonstrate a solution processed bi-layer PLED based on poly(p-phenylene vinylene) derivatives using orthogonal solvents. To lower the voltage drop the hole transport layer (HTL) based on poly[2,5-bis(2-ethylhexyloxy)-co-2,5- bis(butoxy)-1,4-phenylenevinylene] (BEH/BB-PPV (1:3)) is doped with tetracyano-tetrafluoro-quinodimethane (F4TCNQ)....article 2011
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Bechtold, T. (author), Hohlfeld, D. (author), Rudnyi, E.B. (author), Günther, M. (author)In this paper we present a novel highly efficient approach to determine material properties from measurement results. We apply our method to thermal properties of thin-film multilayers with three different materials, amorphous silicon, silicon nitride and silicon oxide. The individual material properties are identified by solving an optimization...article 2010
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Belfroid, S.P.C. (author), Cargnelutti, M.F. (author), Schiferli, W. (author), van Osch, M.M.E. (author)To be able to assess the mechanical integrity of piping structures for loading to multiphase flow conditions, air-water experiments were carried out in a horizontal 1" pipe system. Forces and accelerations were measured on a number of bends and T-joint configurations for a wide range of operating conditions. Five different configurations were...conference paper 2010
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Cargnelutti, M.F. (author), Belfroid, S.P.C. (author), Schiferli, W. (author), van Osch, M.M.E. (author)Air-water experiments were carried out in a horizontal 1" pipe system to measure the magnitude of the forces induced by the multiphase flow. Forces and accelerations were measured on a number of bends and T-joint configurations for a wide range of operating conditions. Five different configurations were measured: a baseline case consisting of...conference paper 2010
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Zhang, Y. (author), Blom, P.W.M. (author), TNO Industrie en Techniek (author)The hole injection in Schottky barriers formed between p -type doped regioregular poly(3-hexylthiophene-2,5-diyl) (rr-P3HT) and silver (Ag) is investigated. The rr-P3HT is controllably doped using the acceptor 2,3,5,6-Tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ). We demonstrate that only one order of magnitude increase in the...article 2010
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Kudryavtsev, Y.V. (author), Gelinck, E.R.M. (author), Fischer, H.R. (author), TNO Industrie en Techniek (author)A theoretical investigation of van der Waals forces acting between two solid silicon surfaces at separations from zero to approximately 20 nm is presented. We focused our efforts on the analysis of different factors that can cause deviations from the classical pressure-distance dependence p ∼ 1/D3. It is demonstrated that a layer (oxide or water...article 2009
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Zhang, Y. (author), de Boer, B. (author), Blom, P.W.M. (author), TNO Industrie en Techniek (author)Here, controlled p-type doping of poly(2-methoxy-5-(20-ethylhexyloxy)- pphenylene vinylene) (MEH-PPV) deposited from solution using tetrafluorotetracyanoquinodimethane (F4-TCNQ) as a dopant is presented. By using a co-solvent, aggregation in solution can be prevented and doped films can be deposited. Upon doping the current-voltage...article 2009
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Moet, D.J.D. (author), Lenes, M. (author), Kotlarski, J.D. (author), Veenstra, S.C. (author), Sweelssen, J. (author), Koetse, M.M. (author), de Boer, B. (author), Blom, P.W.M. (author), TNO Industrie en Techniek (author)The effect of the molecular weight of poly[9,9-didecanefluorene-alt-(bis-thienylene) benzothiadiazole] (PF10TBT) on the photovoltaic performance of fullerene-based bulk heterojunction solar cells is investigated. An increase in molecular weight of two orders of magnitude results in a 30% increase of the short-circuit current and a rise of the...article 2009
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Janssen, G.C.A.M. (author), Abdalla, M.M. (author), van Keulen, F. (author), Pujada, B.R. (author), van Venrooy, B. (author), TNO Industrie en Techniek (author)Stress in a thin film on a flexible substrate induces a curvature of the substrate. Usually the substrate is orders of magnitude thicker than the film, leading to small and purely elastic deformation of the substrate. In this case, the Stoney equation yields the stress in the film from the measured curvature of the substrate. The Stoney equation...article 2009
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Asadi, K. (author), de Boer, T.G. (author), Blom, P.W.M. (author), de Leeuw, D.M. (author), TNO Industrie en Techniek (author)Organic non-volatile resistive bistable diodes based on phase-separated blends of ferroelectric and semiconducting polymers are fabricated. The polarization field of the ferroelectric modulates the injection barrier at the semiconductor-electrode contact and, hence, the resistance of the comprising diodes. Comparison between the on- and off...article 2009
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Leijtens, J.A.P. (author)Sunsensors are used for the attitude control of satellites. The common sensors use either the cosine dependence of the photo current or the sensing of a centroïd movement for a spot which is created by positioning a pinhole at a known distance above a position sensitive detector. Recent research initiated by the Dutch Microned program has lead...conference paper 2008