Searched for: subject%3A%22Organic%255C%2Blight%255C-emitting%255C%2Bdiodes%22
(1 - 20 of 44)

Pages

document
Kamijo, T. (author), de Winter, S. (author), Panditha, P. (author), Meulenkamp, E. (author)
The transparent conductive electrode (TCE) is a key component of organic light-emitting diodes (OLEDs). High-resolution printed metal grids are a promising alternative to indium tin oxide (ITO). We present results for evaporated OLEDs with a printed copper (Cu) grid with line width below 3 μm. The use of a thick doped hole injection layer (HIL)...
article 2022
document
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
document
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
document
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
document
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
document
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
document
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
document
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
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
document
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
document
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
document
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
document
Naithani, S. (author), Mandamparambil, R. (author), Fledderus, H. (author), Schaubroeck, D. (author), van Steenberge, G. (author)
The fast-growing market of organic electronics stimulates the development of versatile technologies for structuring thin-film materials. Ultraviolet lasers have proven their full potential for patterning organic thin films, but only a few studies report on interaction with thin-film barrier layers. In this paper, we present an approach in which...
article 2014
document
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
document
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
document
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
document
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
document
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
document
Gorter, H. (author), Coenen, M.J.J. (author), Slaats, M.W.L. (author), Ren, M. (author), Lu, W. (author), Kuijpers, C.J. (author), Groen, W.A. (author)
Thermal evaporation is the current standard for the manufacture of small molecule organic light emitting diodes (smOLEDs), but it requires vacuum process, complicated shadow masks and is inefficient in material utilization, resulting in high cost of ownership. As an alternative, wet solution deposition can provide significant cost savings by...
article 2013
document
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
Searched for: subject%3A%22Organic%255C%2Blight%255C-emitting%255C%2Bdiodes%22
(1 - 20 of 44)

Pages