Searched for: subject:"Organic%5C+light%5C+emitting%5C+diodes%5C+%5C%28OLED%5C%29"
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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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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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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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Janka, M. (author), Gierth, R. (author), Rubingh, J.E. (author), Abendroth, M. (author), Eggert, M. (author), Moet, D.J.D. (author), Lupo, D. (author)
We report the self-aligned passivation of a current distribution grid for an organic light emitting diode (OLED) anode using a pulsed Joule heating method to align the passivation layer accurately on the metal grid. This method involves passing an electric current through the grid to cure a polymer dielectric. Uncured polymer is then rinsed away...
article 2015
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Deutz, D.B. (author), Tempelman, E. (author), van der Zwaag, S. (author), Groen, W.A. (author)
To enable the design of more intuitive product user interfaces, the prospects of matching piezoelectric touch sensors with flexible organic light emitting diode (OLED) technology are investigated. Low stiffness piezoelectric composite sensors, combining piezoelectric Pb(Zr,Ti)O3 powder with a polymer matrix, are prepared and compared to existing...
article 2015
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Jolt Oostra, A. (author), Blom, P.W.M. (author), Michels, J.J. (author)
Pinholes in the emitting layer of an organic light emitting diode (OLED), e.g. induced by particle contamination or processing flaws, lead to direct contact between the hole-injection layer (HIL) and the cathode. The resulting short circuits give rise to catastrophic device failure. We demonstrate that these short circuits can be effectively...
article 2014
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Eggenhuisen, T.M. (author), Coenen, M.J.J. (author), Slaats, M.W.L. (author), Groen, W.A. (author)
The transfer of laboratory scale solution processing 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, the authors discuss large area inkjet printing using industrial...
article 2014
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Genoe, J. (author), Obata, K. (author), Ameys, M. (author), Myny, K. (author), Ke, T.H. (author), Nag, M. (author), Steudel, S. (author), Schols, S. (author), Maas, J. (author), Tripathi, A. (author), Van Der Steen, J.-L. (author), Ellis, T. (author), Gelinck, G.H. (author), Heremans, P. (author)
The efficiency of small-molecule OLED devices increased substantially in recent years, creating opportunities for power-efficient displays, as only light is generated proportional to the subpixel intensity. However, current active matrix OLED (AMOLED) displays on foil do not validate this power-efficient advantage, as too much power is lost in...
conference paper 2014
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Gelinck, G.H. (author), van der Steen, J.L. (author), Tripathi, A.K. (author), Ellis, T. (author), Akkerman, H. (author), van Leuken, L. (author), Li, F. (author), Maas, J. (author), Smits, E. (author), Rovers, M. (author), Nag, M. (author), Myny, K. (author), Malinowski, P. (author), Ameys, M. (author), Ke, T.H. (author), Schols, S. (author), Steudel, S. (author), Genoe, J. (author), Heremans, P. (author)
In this paper, we present some of the technology challenges and process temperature trade-offs when realizing AM OLED displays on thin flexible plastic films that can be mechanically bent to a roll radius of ∼1 cm. We furthermore present complementary approaches to realize low-power, high resolution OLED displays using self-aligned IGZO TFT...
conference paper 2014
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Vuorinen, T. (author), Janka, M. (author), Rubingh, J.E.J.M. (author), Tuukkanen, S. (author), Groen, P. (author), Lupo, D. (author)
In applications such as organic light emitting diodes (OLEDs) or photovoltaic cells a homogenous voltage distribution in the large anode layer needs to be ensured by including a metal grid with a transparent conductor layer. To ensure sufficient conductivity, relatively thick metal lines are used, which increases the risk of electrical shorts...
conference paper 2014
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Nag, M. (author), Obata, K. (author), Fukui, Y. (author), Myny, K. (author), Schols, S. (author), Vicca, P. (author), Ke, T.H. (author), Smout, S. (author), Willegems, M. (author), Ameys, M. (author), Bhoolokam, A. (author), Muller, R. (author), Cobb, B. (author), Kumar, A. (author), van der Steen, J.L. (author), Ellis, T. (author), Gelinck, G.H. (author), Genoe, J. (author), Heremans, P. (author), Steudel, S. (author)
We present a QQVGA (160times120 with 3 sub-pixel) top-emitting AMOLED display with 85ppi resolution using a self-aligned (SA) IGZO TFT backplane on polyimide-foil. The back plane process flow is based on a 5 layer photolithography process. The aperture ratio of the top-emitting OLEDs is approx. 25%. For operation at 6 V supply voltage (VDD), the...
article 2014
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Fukui, Y. (author), Shibata, M. (author), Tanaka, Y. (author), Okumoto, K. (author), Morita, K. (author), Otake, K. (author), Tripathi, A.K. (author), van der Putten, B. (author), van der Steen, J.L. (author), Tempelaars, K. (author), van Leuken, L. (author), Li, F. (author), Yakimets, I. (author), Gelinck, G.H. (author), Myny, K. (author), Smout, S. (author), Willegems, M. (author), Schols, S. (author), Steudel, S. (author), Genoe, J. (author), Heremans, P. (author)
We have developed a full color flexible top-emission AMOLED display with 80 ppi resolution using In-Ga-Zn-O TFT backplane on PEN foil under the maximum process temperature of 150 oC. Notwithstanding the low processing temperature, the TFTs with SiOx passivation layer show high reliability with VTH shift of less than 0.2 V at 10,000 seconds under...
article 2013
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Li, F.M. (author), Unnikrishnan, S. (author), van de Weijer, P. (author), van Assche, F. (author), Shen, J. (author), Ellis, T. (author), Manders, W. (author), Akkerman, H. (author), Bouten, P. (author), van Mol, A.M.B. (author)
The availability of a high performance thin-film barrier is the most critical challenge in upscaling and commercializing flexible OLED products. We report a flexible thin-film-barrier technology that meets lifetime specifications for OLED lighting, and demonstrate it in rollable QVGA a-IGZO AMOLED displays. Roll-to-roll manufacturing of this...
article 2013
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Kuik, M. (author), Koster, L.J.A. (author), Dijkstra, A.G. (author), Wetzelaer, G.A.H. (author), Blom, P.W.M. (author)
We present a quantitative analysis of the loss of electroluminescence in light-emitting diodes (LEDs) based on poly[2-methoxy-5-(2′-ethylhexyloxy)- p-phenylenevinylene] (MEH-PPV) due to the combination of non-radiative trap-assisted recombination and exciton quenching at the metallic cathode. It is demonstrated that for an MEH-PPV LED the...
article 2012
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Nicolai, H.T. (author), Hof, A. (author), Oosthoek, J.L.M. (author), Blom, P.W.M. (author)
The charge transport in blue light-emitting polyspirobifluorene is investigated by both steady-state current-voltage measurements and transient electroluminescence. Both measurement techniques yield consistent results and show that the hole transport is space-charge limited. The electron current is found to be governed by a high intrinsic...
article 2011
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Asadi, K. (author), Blom, P.W.M. (author), de Leeuw, D.M. (author)
Passive or active matrix driving schemes in large displays are prone to high power consumption and cost, respectively. For signage applications such as large out-door displays with low refresh rates there is as yet no technological solution. Here the MEMOLED solution, an organic light-emitting diode with an integrated ferroelectric memory, is...
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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Gelinck, G.H. (author), Heremans, P. (author), Nomoto, K. (author), Anthopoulos, T.D. (author), TNO Industrie en Techniek (author)
Organic thin-film transistors (OTFTs) offer unprecedented opportunities for implementation in a broad range of technological applications spanning from large-volume microelectronics and optical displays to chemical and biological sensors. In this Progress Report, we review the application of organic transistors in the fields of flexible optical...
article 2010
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Mandamparambil, R. (author), Fledderus, H. (author), Steenberge, G.V. (author), Dietzel, A.H. (author), TNO Industrie en Techniek (author)
A femtosecond laser has been successfully utilized for patterning thin Flexible Organic Light Emitting Diode (FOLED) structures of individual layer thickness around 100nm. The authors report in this paper a step-like ablation behavior at the layer interfaces which accounts for a local removal of entire layers. Various surface analyzing...
article 2010
Searched for: subject:"Organic%5C+light%5C+emitting%5C+diodes%5C+%5C%28OLED%5C%29"
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