Searched for: author%3A%22Akkerman%2C+H.B.%22
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Kamijo, T. (author), Breemen, A.J.J.M. (author), Ma, X. (author), Shanmugam, S. (author), Bel, M.G.J. (author), Haas, G.J.A.G.F. (author), Peeters, B. (author), Petre, A.R. (author), Tordera, D. (author), Verbeek, R.G.F.A. (author), Akkerman, H.B. (author), Hagelsieb, L.M. (author), de Roose, F. (author), Lieberman, I. (author), Yamaguchi, F. (author), Janssen, R.A.J. (author), Meulenkamp, E.A. (author), Kronemeijer, A.J. (author), Gelinck, G.H. (author)
Touchless user interfaces that are based on gestures typically rely on near-infrared cameras. However, such systems are often hampered by their limited field of view and high-accuracy calibration requirements. Here we report a touchless user interface that is based on a visually transparent near-infrared-sensitive organic photodetector array and...
article 2023
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Ollearo, R. (author), Ma, X. (author), Akkerman, H.B. (author), Fattori, M. (author), Dyson, M.J. (author), van Breemen, A.J.J.M. (author), Meskers, S.C.J. (author), Dijkstra, W. (author), Janssen, R.A.J. (author), Gelinck, G.H. (author)
Remote measurement of vital sign parameters like heartbeat and respiration rate represents a compelling challenge in monitoring an individual's health in a noninvasive way. This could be achieved by large field-of-view, easy-to-integrate unobtrusive sensors, such as large-area thin-film photodiodes. At long distances, however, discriminating...
article 2023
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Deumel, S. (author), van Breemen, A.J.J.M. (author), Peeters, B. (author), Maas, J. (author), Akkerman, H.B. (author), Meulenkamp, E.A. (author), Gelinck, G.H. (author), Huerdler, J.E. (author), Schmidt, O. (author), Heiss, W. (author), Tedde, S.F. (author)
Future medical X-ray imaging will benefit from advances in computing power and artificial intelligence as well as improvements in the X-ray detector performance itself. Hybrid inorganic-organic perovskite materials promise direct conversion detectors with higher image quality, owing to their strong X-ray absorption, high electron and hole...
conference paper 2022
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van Breemen, A.J.J.M. (author), Ollearo, R. (author), Deumel, S. (author), Akkerman, H.B. (author), Kronemeijer, A.J. (author), Janssen, R.A.J. (author), Tedde, S.F. (author), Gelinck, G.H. (author)
Solution-processed metal halide perovskite photodetectors (PPDs) have a great potential in visible and near-infrared light sensing and X-ray imaging applications, owing to their excellent optoelectronic properties. This presentation will consist of two parts.
conference paper 2022
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Oliveira A.M., (author), Akkerman H.B., (author), Braccini S., (author), Breemen A.J.J.M. van, (author), Manzano L.G., (author), Heracleous N., (author), Katsouras I., (author), Leidner J., (author), Murtas F., (author), Peeters B., (author), Silari M., (author)
Quality Assurance (QA) in hadron therapy is crucial to ensure safe and accurate dose delivery to patients. This can be achieved with fast, reliable and high-resolution detectors. In this paper, we present a novel solution that combines a triple Gas Electron Multiplier (GEM) and a highly pixelated readout based on a matrix of organic photodiodes...
article 2021
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van Breemen, A.J.J.M. (author), Simon, M. (author), Tousignant, O. (author), Shanmugam, S. (author), der J.L. Steen, van (author), Akkerman, H.B. (author), Kronemeijer, A. (author), Ruetten, W. (author), Raaijmakers, R. (author), Alving, L. (author), Jacobs, J. (author), Malinowski, P.E. (author), de Roose, F. (author), Gelinck, G.H. (author)
A curved image sensor on plastic foil has been developed for cone beam computed tomography (CBCT) X-ray imaging. The image sensor of about 6 × 8 cm2 size has been built on a thin polyimide foil with an indium gallium zinc oxide (IGZO) backplane and an organic photodetectors (OPD) frontplane. A flexible cesium iodide (CsI) scintillator has been...
article 2020
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Peters, L.C.J.M. (author), Ollearo, R. (author), Verbeek, R.G.F.A. (author), van der Steen, J.L.P.J. (author), Akkerman, H.B. (author), Volker, A.W.F. (author), van Neer, P.L.M.J. (author), Gelinck, G.H. (author)
Large-area flexible ultrasound arrays can offer new ultrasound modalities in multiple fields. The production of these arrays when using CMOS-type fabrication techniques faces scalability challenges and costs increase dramatically when upscaled to large dimensions. We investigate the monolithic production of large-area PPT (Printed Polymer...
conference paper 2019
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van de Weijer, P. (author), Akkerman, H.B. (author)
In order to protect a flexible OLED on plastic foil against water from the ambient atmosphere a top and bottom thin-film encapsulation (TFE) is necessary. A TFE stack SiN-OCP-SiN with getter in OCP results in excellent shelf lifetime. However, the getter particles result in light scattering that is lost upon water ingress in the stack. As a...
article 2019
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Tordera, D. (author), Peeters, B. (author), Akkerman, H.B. (author), van Breemen, A.J.J.M. (author), Maas, J. (author), Shanmugam, S. (author), Kronemeijer, A.J. (author), Gelinck, G.H. (author)
Organic photodetectors (OPDs) have attracted much attention in recent years, due to their promise in large-area light sensing applications. Here, high-resolution slot-die-coated large-area bulk heterojunction organic photodiode (OPD) arrays are reported. The OPD uses a novel electron transport layer, indium gallium zinc oxide in combination with...
article 2019
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van Neer, P.L.M.J. (author), Volker, A.W.F. (author), Berkhoff, A.P. (author), Akkerman, H.B. (author), Schrama, T. (author), van Breemen, A. (author), Gelinck, G.H. (author)
Recently, there has been considerable interest in the development of ultrasound based mid-air haptic feedback devices. These devices allow for tactile sensations to be induced at any position and time without constraints to human motion, which is useful for virtual user interfaces, augmented/virtual reality and feedback buttons. The haptic...
conference paper 2018
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Akkerman, H.B. (author), Pendayala, R. (author), Panditha, V.K.P. (author), Salem, A. (author), Shen, J. (author), van de Weijer, P. (author), Bouten, P.C.P. (author), Winter, S.H.P.M. (author), van Diesen-Tempelaars, K. (author), de Haas, G.J.A.J.F. (author), Steudel, S. (author), Huand, C. (author), Lai, M. (author), Huang, Y. (author), Yeh, M. (author), Kronemeijer, A.J. (author), Poodt, P. (author), Gelinck, G. (author)
We present a thin-film dual-layer bottom barrier on PI that is compatible with 350°C backplane processing for OLED displays. We demonstrate OLEDs that survive bending over 0.5 mm radius for 10.000x. Furthermore, we show compatibility of the bottom barrier with the backplane process by fabricating AMOLED displays on GEN1-sized substrates.
conference paper 2018
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van de Weijer, P. (author), Akkerman, H.B. (author), Bouten, P.C.P. (author), Panditha, P. (author), Klaassen, P.J.M. (author), Salem, A. (author)
Side leakage experiments have been performed on the organic interlayer, so-called organic coating for planarization (OCP), in a hybrid thin-film encapsulation (TFE) stack based on two silicon nitride (SiN) barrier layers that was developed for organic light-emitting diodes (OLED). To measure the side leakage into OCP, a metallic Ca thin-film...
article 2018
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Kronemeijer, A.J. (author), Katsouras, I. (author), Poodt, P. (author), Akkerman, H.B. (author), van Breemen, A.J.J.M. (author), Gelinck, G.H. (author)
We present recent developments on flexible a-IGZO TFT technology scaling in terms of TFT channel length and operating voltage, as well as manufacturing cost optimization with a focus on R2R processing compatibility. We present progress on the relevant technology building blocks; (i) R2R compatible TFT architecture, (ii) (multilevel) nanoimprint...
conference paper 2018
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Akkerman, H.B. (author), Pendyala, R.K. (author), Panditha, P. (author), Salem, A. (author), Shen, J. (author), van de Weijer, P. (author), Bouten, P.C.P. (author), de Winter, S.H.P.M. (author), van Diesen-Tempelaars, K. (author), de Haas, G. (author), Steudel, S. (author), Huang, C.Y. (author), Lai, M.H. (author), Huang, Y.Y. (author), Yeh, M.H. (author), Kronemeijer, A.J. (author), Poodt, P. (author), Gelinck, G.H. (author)
We present a thin-film dual-layer bottom barrier on polyimide that is compatible with 350°C backplane processing for organic light-emitting diode displays and that can facilitate foldable active-matrix organic light-emitting diode devices with a bending radius of <2 mm. We demonstrate organic light-emitting diodes that survive bending over 0.5...
article 2018
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van de Weijer, P. (author), Bouten, P.C.P. (author), Unnikrishnan, S. (author), Akkerman, H.B. (author), Michels, J.J. (author), van Mol, T.M.B. (author)
Organic light-emitting diodes degrade rapidly by means of local cathode oxidation when exposed to the ambient atmosphere, resulting in visible non-emissive areas called black spots. High performance inorganic based encapsulations are required to protect the OLED. We have applied a hybrid thin-film encapsulation stack consisting of two inorganic...
article 2017
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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
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Fledderus, H. (author), Akkerman, H.B. (author), Salem, A. (author), Friedrich Schilling, N. (author), Klotzbach, U. (author)
We present the development of laser processes for flexible OPV on roll-to-roll (RR2R) produced thin film barrier with indium tin oxide (ITO) as transparent conductive (TC) bottom electrode. Direct laser structuring of ITO on such barrier films (so-called P1 process) is very challenging since the layers are all transparent, a complete electrical...
conference paper 2017
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van de Weijer, P. (author), Lu, K. (author), Janssen, R.R. (author), de Winter, S.H.P.M. (author), Akkerman, H.B. (author)
When organic light-emitting diodes (OLEDs) are exposed to the ambient atmosphere, water penetration through pinholes in the cathode results in the formation of non-emissive areas (black spots) due to local oxidation of the cathode around the pinhole. This degradation effect severely limits the lifetime of OLED devices and requires high...
article 2016
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Kronemeijer, A.J. (author), Huisman, E.H. (author), Akkerman, H.B. (author), Goossens, A.M. (author), Katsouras, I. (author), van Hal, P.A. (author), Geuns, T.C.T. (author), van der Molen, S.J. (author), Blom, P.W.M. (author), de Leeuw, D.M. (author), TNO Industrie en Techniek (author)
We have studied the electrical characteristics of close-packed monolayers of conjugated para-phenylene oligomers as a function of molecular length in large-area molecular junctions. An exponential increase in resistance with molecular length is observed, Rexp (βL), with β=0.26±0.04 Å-1 and β=0.20±0.06 Å-1 for dithiol and monothiol derivatives,...
article 2010
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Akkerman, H.B. (author), Kronemeijer, A.J. (author), Harkema, J. (author), van Hal, P.A. (author), Smits, E.C.P. (author), de Leeuw, D.M. (author), Blom, P.W.M. (author), TNO Industrie en Techniek (author)
article 2009
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