Searched for:
(1 - 19 of 19)
document
Huckaba, A.J. (author), Senes, A. (author), Aghazada, S. (author), Babaei, A. (author), Meskers, S.C.J. (author), Zimmerman, I. (author), Schouwink, P. (author), Gasilova, N. (author), Janssen, R.A.J. (author), Bolink, H.J. (author), Nazeeruddin, M.K. (author)
The straightforward synthesis and photophysical properties of a new series of heteroleptic iridium(III) bis(2-arylimidazole) picolinate complexes are reported. Each complex has been characterized by nuclear magnetic resonance, UV−vis, cyclic voltammetry, and photoluminescent angle dependency, and the emissive properties of each are described....
article 2018
document
van de Weijer, P. (author), Bouten, P.C.P. (author), Fledderus, H. (author), Janssen, R.R. (author), de Winter, S.H.P.M. (author), Akkerman, H.B. (author)
Local laser ablation of the cathode of OLEDs has been applied to create a population of pinholes of the same size. This enables the direct comparison at different conditions of black spots and grey spots in the emission of OLEDs as a result of water ingress into the device. We confirmed earlier observations on the operational effect of black...
article 2017
document
van Veldhoven, J. (author), te Sligte, E. (author), Janssen, J.P.B. (author)
Most ion sources that produce high-flux hydrogen ion beams perform best in the high energy range (keV). Alternatively, some plasma sources produce very-lowenergy ions (<< 10 eV). However, in an intermediate energy range of 10-200 eV, no hydrogen ion sources were found that produce high-flux beams. We believe such a source would be of interest to...
public lecture 2016
document
Khikhlovskyi, V. (author), van Breemen, A.J.J.M. (author), Janssen, R.A.J. (author), Gelinck, G.H. (author), Kemerink, M. (author)
Solution-processed organic ferroelectric resistive switches could become the long-missing non-volatile memory elements in organic electronic devices. To this end, data retention in these devices should be characterized, understood and controlled. First, it is shown that the measurement protocol can strongly affect the 'apparent' retention time...
article 2016
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Senes, A. (author), Meskers, S.C.J. (author), Dijkstra, W.M. (author), van Franeker, J.J. (author), Altazin, S. (author), Wilson, J.S. (author), Janssen, R.A.J. (author)
The low light-outcoupling efficiency of organic light emitting diodes (OLEDs) is limiting their performance. Orientation of the transition dipole moment of the emitting molecules in the plane of the diodes can improve the luminance of OLEDs. While the orientation of evaporated small-molecule materials has been studied in the past few years, not...
article 2016
document
Torricelli, F. (author), Ghittorelli, M. (author), Smits, E.C.P. (author), Roelofs, C.W.S. (author), Janssen, R.A.J. (author), Gelinck, G.H. (author), Kovács-Vajna, Z.M. (author), Cantatore, E. (author)
Ambipolar transistors typically suffer from large off-current inherently due to ambipolar conduction. Using a tri-gate transistor it is shown that it is possible to electrostatically switch ambipolar polymer transistors from ambipolar to unipolar mode. In unipolar mode, symmetric characteristics with an on/off current ratio of larger than 105...
article 2016
document
Barink, M. (author), Mavinkurve, A. (author), Janssen, J. (author)
This study made an attempt to predict the temperature-dependent moisture diffusion of an epoxy molding compound with 3 different diffusion models: Fickian, dual stage and Langmuir diffusion. The Langmuir model provided the best prediction of the moisture diffusion when simulating the input experiments. Beyond the temperature range of the input...
article 2016
document
Timmreck, R. (author), Meyer, T. (author), Gilot, J. (author), Seifert, H. (author), Mueller, T. (author), Furlan, A. (author), Wienk, M.M. (author), Wynands, D. (author), Hohl-Ebinger, J. (author), Warta, W. (author), Janssen, R.A.J. (author), Riede, M. (author), Leo, K. (author)
To the Editor — The tandem solar cell approach is a promising concept for organic photovoltaics (OPVs). However, efficiency determination or, in general, electrical characterization of multi-junction solar cells is challenging. We performed a literature survey of publications reporting tandem OPV characterizations over the period January 2009 to...
article 2015
document
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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Khikhlovskyi, V. (author), Wang, R. (author), van Breemen, A.J.J.M. (author), Gelinck, G.H. (author), Janssen, R.A.J. (author), Kemerink, M. (author)
Organic ferroelectric resistive switches function by grace of nanoscale phase separation in a blend of a semiconducting and a ferroelectric polymer that is sandwiched between metallic electrodes. In this work, various scanning probe techniques are combined with numerical modeling to unravel their operational mechanism. Resistive switching is...
article 2014
document
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
document
van der Walle, P. (author), Kumar, P. (author), Ityaksov, D. (author), Versluis, R. (author), Maas, D.J. (author), Kievit, O. (author), Janssen, O. (author), van der Donck, J.C.J. (author)
In dark-field particle inspection, the limiting factor for sensitivity is the amount of background scatter due to substrate roughness. This scatter forms a speckle pattern and shows an intensity distribution with a long tail. To reduce false-positives to an acceptable level, a high detection threshold should be chosen such that the tail of the...
conference paper 2013
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van Franeker, J.J. (author), Voorthuijzen, W.P. (author), Gorter, H. (author), Hendriks, K.H. (author), Janssen, R.A.J. (author), Hadipour, A. (author), Andriessen, H.A.J.M. (author), Galagan, Y.O. (author)
Abstract All-solution processed organic solar cells with a conventional device structure were demonstrated. The evaporated low work function LiF/Al electrode was replaced by a printed high work function silver electrode combined with an additional electron transport layer (ETL). Two electron transport layers were tested: (I) zinc oxide (ZnO)...
article 2013
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Illiberi, A. (author), Kniknie, B. (author), van Deelen, J. (author), Steijvers, H.L.A.H. (author), Habets, D. (author), Simons, P.J.P.M. (author), Janssen, A.C. (author), Beckers, E.H.A. (author)
Aluminum doped ZnOx (ZnOx:Al) films have been deposited on glass in an in-line industrial-type reactor by a metalorganic chemical vapor deposition process at atmospheric pressure. Tertiary-butanol has been used as oxidant for diethylzinc and trimethylaluminium as dopant gas. ZnOx:Al films can be grown at very high deposition rates of ~14 nm/s...
article 2011
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Janssen, J.P.B. (author), van Heijningen, M. (author), Visser, G.C. (author), Rodenburg, M. (author), Johnson, H.K. (author), Uren, M.J. (author), Morvan, E. (author), van Vliet, F.E. (author), TNO Defensie en Veiligheid (author)
Gallium-Nitride technology is known for its high power density and power amplifier designs, but is also very well suited to realise robust receiver components. This paper presents the design, realisation and measurement of two robust AlGaN/GaN low noise amplifiers. The two versions have been designed in the Alcatel-Thales III-V lab AlGaN/GaN...
conference paper 2009
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Charrier, D.S.H. (author), de Vries, T. (author), Mathijssen, S.G.J. (author), Geluk, E.-J. (author), Smits, E.C.P. (author), Kemerink, M. (author), Janssen, R.A.J. (author), TNO Industrie en Techniek (author)
In ambipolar organic field effect transistors (OFET) the shape of the channel potential is intimately related to the recombination zone width W, and hence to the electron–hole recombination strength. Experimentally, the recombination profile can be assessed by scanning Kelvin probe microscopy (SKPM). However, surface potentials as measured by...
article 2009
document
van Heijningen, M. (author), Janssen, J.P.B. (author), van Vliet, F.E. (author), TNO Defensie en Veiligheid (author)
Apart from delivering very high output powers, GaN can also be used to realize robust receiver components, such as Low Noise Amplifiersand Switches. This paper presents the designand measurement results of two GaN X-band switch and LNA MMICs, designed for integration in a radar front end. The switch design shows a 1 dB compression point of 43...
article 2009
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Kemerink, M. (author), Charrier, S.H. (author), Smits, E.C.P. (author), Mathijssen, S.G.J. (author), de Leeuw, D.M. (author), Janssen, R.A.J. (author), TNO Industrie en Techniek (author)
article 2008
document
Mathijssen, S.G.J. (author), van Hal, P.A. (author), van den Biggelaar, T.J.M. (author), Smits, E.C.P. (author), de Boer, B. (author), Kemerink, M. (author), Janssen, R.A.J. (author), de Leeuw, D.M. (author)
In organic light-emitting diodes (OLEDs), interface dipoles play an important role in the process of charge injection from the metallic electrode into the active organic layer.[1,2] An oriented dipole layer changes the effective work function of the electrode because of its internal electric field. The differences between the work functions of...
article 2008
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