Searched for: subject:"OLEDs"
(1 - 20 of 70)

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Akkerman, H. (author), Peeters, B. (author), van Breemen, A. (author), Shanmugam, S. (author), Ugalde Lopez, L. (author), Tordera, D. (author), van de Ketterij, R. (author), Delvitto, E. (author), Malinowski, P. (author), Ke, T.-H. (author), De Roose, F. (author), Moreno Hagelsieb, L. (author), Katsouras, I. (author), Kronemeijer, A.J. (author), Meulenkamp, E. (author), Gelinck, G. (author)
In recent years there is an increasing interest to integrate optical sensing in mobile displays, for instance, for biometric fingerprint scanning functionality. There are several routes to incorporate optical fingerprint functionality within the full display area, each with their own benefits and challenges. Here we investigate the different...
conference paper 2021
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Ke, T.-H. (author), Epimitheas, E. (author), Molina Alvarez, G. (author), Vandenplas, E. (author), Moreno Hagelsieb, L. (author), Akkerman, H. (author), Shanmugam, S. (author), van Breemen, A. (author), Heremans, P. (author), Malinowski, P. (author)
We apply a photolithographic patterning process to integrate a green phosphorescent organic light emitting diode (OLED) with a polymer‐based organic photodetector (OPD) side‐by‐side with resolution up to 635 ppi. The characteristics of OLED and OPD before and after patterning are investigated. The crosstalk between OLED and OPD subpixels and the...
conference paper 2021
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de Braaf, B. (author), Rops, C.M. (author), Storm, C. (author)
In atomic layer deposition (ALD), thin layers of materials are deposited on a substrate with atomic layer precision in the vertical direction. The ability to control layer growth in the lateral direction as well is expected to greatly increase the potential of ALD as a path to the bottom-up additive fabrication of electronic devices like solar...
article 2021
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López-Fraguas, E. (author), Arredondo, B. (author), Vega-Colado, C. (author), Pozo, G.D. (author), Najafi, M. (author), Martín-Martín, D. (author), Galagan, Y. (author), Sánchez-Pena, J.M. (author), Vergaz, R. (author), Romero, B. (author)
The past few years have seen a great increase in the development of Visible Light Communication systems (VLC), mainly triggered by the wide variety of situations they can be used in. These communication systems have traditionally employed inorganic light emitters and photodetectors. In this work, we present a VLC system using an organic emitter...
article 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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Malinowski, P.E. (author), Ke, T.-H. (author), Akkerman, H. (author), Nakamura, A. (author), Shanmugam, S. (author), van Breemen, A. (author), Velpen, D.V. (author), Vandenplas, E. (author), Hagelsieb, L.M. (author), Verscheuren, L. (author), Genoe, J. (author), Dehaene, W. (author), Kronemeier, A.J. (author), Steudel, S. (author), Gelinck, G. (author), Heremans, P. (author)
Patterning organic materials by photolithography enables not only high-resolution, side-by-side RGB OLED arrays, but also the introduction of organic photodetector in the same frontplane. We show patterned active matrix displays processed on flexible backplane. Furthermore, we demonstrate OPD patterning proof-of-concept. These are the building...
conference paper 2019
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Gensler, M. (author), Boeffel, C. (author), Kröpke, S. (author), Kronemeijer, A.J. (author), Ke, T.H. (author), Papadopoulos, N. (author), Yao, J. (author), Stark, J. (author), Obene, P. (author)
High resolution ESJET printing is presented for processing of OLED devices. With appropriate nozzle geometry and driving schemes pixel structures of 10 μm and below are achievable with the final goal of printing a 310 ppi RGB AMOLED display.
conference paper 2018
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Kronemeijer, A.J. (author), Akkerman, H. (author), van der Steen, J.L. (author), Steudel, S. (author), Pendyala, R. (author), Panditha, P. (author), Bel, T. (author), van Diesen, K. (author), de Haas, G. (author), Maas, J. (author), de Riet, J. (author), Rovers, M. (author), Verbeek, R. (author), Nag, M. (author), Verschueren, L. (author), Genoe, J. (author), Dehaene, W. (author), Lu, Y.J. (author), Chiang, S.C. (author), Huang, Y.Y. (author), Yeh, M.H. (author), Gelinck, G. (author)
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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Papadopoulos, N. (author), Steudel, S. (author), de Roose, F. (author), Eigabry, D.M. (author), Kronemeijer, A.J. (author), Genoe, J. (author), Dehaene, W. (author), Myny, K. (author)
In this paper a charge sense amplifier (CSA) using a 5μm In-Ga-Zn-O transistor technology on 15μm thick flexible substrate is presented for readout of a 500dpi fingerprint sensor array targeting direct integration with active matrix organic light emitting displays (AMOLED). The CSA achieves a linear input range of 0.8V for rail to rail output at...
conference paper 2018
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Malinowski, P.E. (author), Ke, T.H. (author), Nakamura, A. (author), Liu, Y.H. (author), van der Velpen, D. (author), Vandenplas, E. (author), Papadopoulos, N. (author), Kronemeijer, A.J. (author), van der Steen, J.L. (author), Steudel, S. (author), Kuo, C.C. (author), Huang, Y.Y. (author), Chen, Y.H. (author), Yeh, M.H. (author), Gelinck, G. (author), Heremans, P. (author)
High-resolution RGB organic light-emitting diode frontplane is a key enabler for direct-view transparent augmented reality displays. In this paper, we demonstrate 1250 ppi passive displays and semi-transparent active displays. Organic light-emitting diode photolithography can provide pixel density above 1000 ppi while keeping effective emission...
article 2018
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Abbel, R. (author), de Vries, I. (author), Langen, A. (author), Kirchner, G. (author), T’Mannetje, H. (author), Gorter, H. (author), Wilson, J. (author), Groen, P. (author)
The large volume production of flexible electronics by solution based roll-to-roll (R2R) manufacturing technologies is a promising upscaling strategy for the organic electronics industry. Typical optoelectronic devices like organic light emitting diodes (OLEDs) consist of a complex stack of functional layers. Solution deposition of these...
article 2017
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Malinowski, P.E. (author), Ke, T. (author), Nakamura, A. (author), Vicca, P. (author), Kronemeijer, A.J. (author), Ameys, M. (author), van der Steen, J.L. (author), Steudel, S. (author), Kamochi, Y. (author), Iwai, Y. (author), Gelinck, G. (author), Heremans, P. (author)
This paper describes the potential of hi-res display fabrication using OLED photolithography. We demonstrate 1250 ppi multicolor arrays, pixel scaling down to 3 μm pitch, integration in active displays, and improving lifetime after patterning (200 hours T75, smOLEDs). Photolithography can enable low-cost, high resolution displays for the 8K – VR...
conference paper 2017
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Langen, A. (author), Abbel, R. (author), de Vries, I. (author), Gorter, H. (author), Kirchner, G. (author), Groen, P. (author)
conference paper 2017
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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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Marinkovic, M. (author), Takata, R. (author), Neumann, A. (author), Pham, D.V. (author), Anselmann, R. (author), Maas, J. (author), van der Steen, J.L. (author), Gelinck, G. (author), Katsouras, Ilias (author)
Solution type metal-oxide semiconductor was processed on mass-production ready equipment and integrated in a backplane with ESL architecture TFTs. Excellent thickness uniformity of the semiconductor layer was obtained over the complete Gen1 glass substrate (320 mm x 352 mm), resulting in homogeneous TFT performance and bias stress reliability....
conference paper 2017
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Oostra, A.J. (author), Reddy, A. (author), Smits, E.C.P. (author), Abbel, R.J. (author), Groen, W.A. (author), Blom, P.W.M. (author), Michels, J.J. (author)
A method is presented to self-repair cracks in embedded silver grid structures used in large area organic electronics. The repair procedure is based on electro-deposition, incited by the application of a moderate DC voltage across the crack. During this process the organic anode that is in direct electrical contact with the silver grid,...
article 2016
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Morales-Masis, M. (author), Dauzou, F. (author), Jeangros, Q. (author), Dabirian, A. (author), Lifka, H. (author), Gierth, R. (author), Ruske, M. (author), Moet, D. (author), Hessler-Wyser, A. (author), Ballif, C. (author)
Flexible large-area organic light-emitting diodes (OLEDs) require highly conductive and transparent anodes for efficient and uniform light emission. Tin-doped indium oxide (ITO) is the standard anode in industry. However, due to the scarcity of indium, alternative anodes that eliminate its use are highly desired. Here an indium-free anode is...
article 2016
Searched for: subject:"OLEDs"
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