document

Capacitive and infrared gas sensors for the assessment of the methane number of lng fuels

Sweelssen, J. (author), Blokland, H. (author), Rajamaki, T. (author), Boersma, A. (author)

Liquid Natural Gas (LNG) is an energy source that is becoming more important in energy transition, as the world is facing lower the CO2 emissions and backup sources for wind and solar energy are needed. LNG is becoming a major player not only as fuel for power plants, but also in transport and mobility. However, the composition of LNG varies...

article 2020

document

A Versatile Capacitive Sensing Platform for the Assessment of the Composition in Gas Mixtures

Sweelssen, J. (author), Blokland, H. (author), Rajamäki, T. (author), Sarjonen, R. (author), Boersma, A. (author)

The energy market is facing a major transition, in which natural gas and renewable gasses will play an important role. However, changing gas sources and compositions will force the gas transporters, gas engine manufacturers, and gas grid operators to monitor the gas quality in a more intensive way. This leads to the need for lower cost, smaller,...

article 2020

document

Sunlight-Fueled, Low-Temperature Ru-Catalyzed Conversion of CO2 and H2 to CH4 with a High Photon-to-Methane Efficiency

Sastre, F. (author), Versluis, C. (author), Meulendijks, N.M.M. (author), Rodriguez-Fernandez, J. (author), Sweelssen, J. (author), Elen, K. (author), van Bael, M.K. (author), den Hartog, T. (author), M.A. Verheijen, . (author), Buskens, P.J.P. (author)

Methane, which has a high energy storage density and is safely stored and transported in our existing infrastructure, can be produced through conversion of the undesired energy carrier H2 with CO2. Methane production with standard transition-metal catalysts requires high-temperature activation (300−500 °C). Alternatively, semiconductor metal...

article 2019

document

Print-drying: Monodisperse droplet spray drying for high quality powder production

Salari, J.W.O. (author), Sweelssen, J. (author), Cremers, R. (author)

public lecture 2016

document

Low-Cost upscaling compatibility of five different ITO-Free architectures for polymer solar cells

Angmo, D. (author), Gonzalez-Valls, I. (author), Veenstra, S. (author), Verhees, W. (author), Sapkota, S. (author), Schiefer, S. (author), Zimmermann, B. (author), Galagan, Y.O. (author), Sweelssen, J. (author), Lira-Cantu, M. (author), Andriessen, H.A.J.M. (author), Kroon, J.M. (author), Krebs, F.C. (author)

article 2013

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Large area inkjet printing for organic solar cells and OLEDs using non-halogenated ink formulations

Eggenhuisen, T.M. (author), Coenen, M.J.J. (author), Staats, T.W.L. (author), Gorter, H. (author), Sweelssen, J. (author), Groen, P. (author)

Transferring lab-scale processes 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 we discuss the solution processing of organic light emitting diodes (OLEDs) or organic...

conference paper 2013

document

Inkjet printing of back electrodes for inverted polymer solar cells

Angmo, D. (author), Sweelssen, J. (author), Andriessen, H.A.J.M. (author), Galagan, Y.O. (author), Krebs, F.C. (author)

Evaporation is the most commonly used deposition method in the processing of back electrodes in polymer solar cells used in scientifi c studies. However, vacuum-based methods such as evaporation are uneconomical in the upscaling of polymer solar cells as they are throughput limiting steps in an otherwise fast roll-to-roll production line. In...

article 2013

document

Inkjet printing technology for OPV applications

Ren, M. (author), Sweelssen, J. (author), Grossiord, N. (author), Gorter, H. (author), Eggenhuisen, T.M. (author), Andriessen, H.A.J.M. (author)

Large-scale production of organic photovoltaics (OPVs) at low cost is, still, a future concept thought to promote the market share of solar energy. Working towards the roll-to-roll production of OPVs, different compatible deposition techniques are investigated. Inkjet printing is a promising candidate, as it allows the contact-free deposition of...

article 2012

document

Inkjet technology for large-area OPV applications

Ren, M. (author), Sweelssen, J. (author), Andriessen, H.A.J.M. (author)

The roll-to-roll manufacturing process is believed to significantly reduce the cost-price of large area organic photovoltaic systems. Therefore, we build up knowledge base concerning the influence of process conditions on the performance of polymer solar cells. Inkjet printing has been a major research in processing photoactive materials because...

conference paper 2011

document

The effect of ketone defects on the charge transport and charge recombination in polyfluorenes

Kuik, M. (author), Wetzelaer, G.-J.A.H. (author), Laddé, J.G. (author), Nicolai, H.T. (author), Wildeman, J. (author), Sweelssen, J. (author), Blom, P.W.M. (author)

The effect of on-chain ketone defects on the charge transport of the polyfluorene derivative poly(9,9-dioctylfluorene) (PFO) is investigated. Using MoO3 as ohmic hole contact, the hole transport in a pristine PFO diode is observed to be limited by space-charge, whereas fluorenone contaminated PFO (PFO-F) is shown to be trap limited by the...

article 2011

document

Solid-state potentiometric biosensors for pH quantification in biological samples

Ivan, M.G. (author), Wiegersma, S. (author), Sweelssen, J. (author), Saalmink, M. (author), Boersma, A. (author)

This paper reports on manufacturing and characterization of an all-solid-state potentiometric sensor aimed at monitoring pH in dialysate or blood plasma for patients who undergo dialysis. The sensing polymer-based membrane, coated on top of the Au working electrodes, contains a polymer matrix - poly(vinyl chloride), octadecyl isonicotinate as...

conference paper 2011

document

Sensitization of p-type NiO using n-type conducting polymers

Chavhan, S.D. (author), Abellon, R.D. (author), van Breemen, A.J.J.M. (author), Koetse, M.M. (author), Sweelssen, J. (author), Savenije, T.J. (author), TNO Industrie en Techniek (author)

We report on the sensitization of a p-type inorganic semiconductor, NiO, by n-type conjugated polymers. NiO thin films were deposited using RF sputtering in pure Ar (NiO A) or in Ar + O₂ (90% + 10%) (NiO B). XPS and Kelvin probe measurements indicate the incorporation of oxygen in NiO B leading to the formation of electron-accepting...

article 2010

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Impact of molecular weight on charge carrier dissociation in solar cells from a polyfluorene derivative

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

document

Compositional and electric field dependence of the dissociation of charge transfer excitons in alternating polyfluorene copolymer/fullerene blends

Veldman, D. (author), Ipek, Ö. (author), Meskers, S.C.J. (author), Sweelssen, J. (author), Koetse, M.M. (author), Veenstra, S.C. (author), Kroon, J.M. (author), van Bavel, S.S. (author), Loos, J. (author), Janssen, R.A.J. (author), TNO Industrie en Techniek (author)

The electro-optical properties of thin films of electron donor-acceptor blends of a fluorene copolymer (PF10TBT) and a fullerene derivative (PCBM) were studied. Transmission electron microscopy shows that in these films nanocrystalline PCBM clusters are formed at high PCBM content. For all concentrations, a charge transfer (CT) transition is...

article 2008

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Optical modelling: a powerful tool in the analysis of highly efficient polymer solar cells

Energieonderzoek Centrum Nederland (author), Kroon, J.M. (author), Slooff, L.H. (author), Veenstra, S.C. (author), Koetse, M.M. (author), Sweelssen, J. (author), Eerenstein, W. (author), Moet, D.J.D. (author)

n.v.t.

conference paper 2007

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Improving Polymer based Photovoltaic Devices by Reducing the Voltage Loss at the Donor-Acceptor Interface

Energieonderzoek Centrum Nederland (author), Kroon, J.M. (author), Slooff, L.H. (author), Veenstra, S.C. (author), Koetse, M.M. (author), Sweelssen, J. (author), Loos, J. (author), Moet, D.J.D. (author), S. Chevtchenko, Svetlana (author)

This paper discusses the characterization and optimization of organic solar cells based on a bulk heterojunction consisting of an alternating copolymer, containing a fluorene and a benzathiadiazole unit with two neighboring thiophene rings, and a fullerene derivative (PCBM). The resulting power conversion efficiency amounts 3.9?İ.2 % (AM1.5, 100...

conference paper 2007

document

Determining the internal quantum efficiency of highly efficient polymer solar cells through optical modeling

Kroon, J.M. (author), Slooff, L.H. (author), Veenstra, S.C. (author), Koetse, M.M. (author), Sweelssen, J. (author), Moet, D.J.D. (author)

A power conversion efficiency of 4.2% (AM1.5, 1000 W/M2) is measured for an organic solar cell based on an active layer of an alternating copolymer, containing a fluorence and a benzothadiazole unit with two neighboring thiophene rings, and a fullerene derivative. Using optical modeling, the absorption profile in the active layer of the solar...

article 2007

document

Photoinduced charge and energy transfer in dye-doped conjugated polymers

Veldman, D. (author), Bastiaansen, J.J.A.M. (author), Langeveld-Voss, B.M.W. (author), Sweelssen, J. (author), Koetse, M.M. (author), Meskers, S.C.J. (author), Janssen, R.A.J. (author), TNO Industrie en Techniek (author)

Conjugated polymer-molecular dye blends of MDMO-PPV (poly[2-methoxy-5-(3′,7′-dimethyloctyloxy)-1,4-phenylenevinylene]) and PF1CVTP (poly[9,9-dioctylfluorene-2,7-diyl-alt-2,5-bis(2-thienyl-1-cyanovinyl)-1-(3′,7′-dimethyloctyloxy)-4-methoxybenzene-5″,5″-diyl]) with three dipyrrometheneboron difluoride (bodipy) dyes were studied by (time-resolved)...

article 2006

document

Triplet formation from the charge-separated state in blends of MDMO-PPV with cyano-containing acceptor polymers

TNO Industrie en Techniek (author), Veldman, D. (author), Offermans, T. (author), Sweelssen, J. (author), Koetse, M.M. (author), Meskers, S.C.J. (author), Janssen, R.A.J. (author)

Polymer blends of MDMO-PPV with three different electron accepting cyano-substituted polymers have been investigated with photoinduced absorption (PIA) spectroscopy. In these blends, an efficient photoinduced charge transfer occurs that quenches the photoluminescence and produces a significant photovoltaic effect when the blends are incorporated...

article 2006

document

Large area liquid crystal monodomain field-effect transistors

TNO Industrie en Techniek (author), van Breemen, A.J.J.M. (author), Herwig, P.T. (author), Chlon, C.H.T. (author), Sweelssen, J. (author), Schoo, H.F.M. (author), Setayesh, S. (author), Hardeman, W.M. (author), Martin, C.A. (author), de Leeuw, D.M. (author), Valeton, J.J.P. (author), Bastiaansen, C.W.M. (author), Broer, D.J. (author), Popa-Merticaru, A.R. (author), Meskers, S.C.J. (author)

Butyl, hexyl, and decyl derivatives of the liquid-crystalline organic semiconductor 5,5″-bis(5-alkyl-2-thienylethynyl)-2,2′:5′, 2″-terthiophene were synthesized and studied with respect to their structural, optical, and electrical properties. By means of an optimized thermal annealing scheme the hexyl and decyl compounds could be processed into...

article 2006