Searched for: subject%3A%22Organic%255C%2Blight%255C-emitting%255C%2Bdiodes%22
(21 - 40 of 44)
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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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Eggenhuisen, T.M. (author), Coenen, M.J.J. (author), Staats, T.W.L. (author), Gorter, H. (author), Sweelssen, J. (author), Groen, P. (author)Transferring lab-scale processes 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 we discuss the solution processing of organic light emitting diodes (OLEDs) or organic...conference paper 2013
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Nicolai, H.T. (author), Hof, A. (author), Blom, P.W.M. (author)The charge transport and recombination in white-emitting polymer light- emitting diodes (PLEDs) are studied. The PLED investigated has a single emissive layer consisting of a copolymer in which a green and red dye are incorporated in a blue backbone. From single-carrier devices the effect of the green- and red-emitting dyes on the hole and...article 2012
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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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Kuik, M. (author), Wetzelaer, G.-J.A.H. (author), Laddé, J.G. (author), Nicolai, H.T. (author), Wildeman, J. (author), Sweelssen, J. (author), Blom, P.W.M. (author)The effect of on-chain ketone defects on the charge transport of the polyfluorene derivative poly(9,9-dioctylfluorene) (PFO) is investigated. Using MoO3 as ohmic hole contact, the hole transport in a pristine PFO diode is observed to be limited by space-charge, whereas fluorenone contaminated PFO (PFO-F) is shown to be trap limited by the...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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Harkema, S. (author), Kicken, R.A.H.J. (author), Langeveld-Voss, B.M.W. (author), van Mensfoort, S.L.M. (author), de Kok, M.M. (author), Coehoorn, R. (author), TNO Industrie en Techniek (author)A study is carried out of the external quantum efficiency (EQE) of organic light-emitting diodes (OLEDs) based on blue-emitting fluorene polymers containing hole-transporting units. For that purpose, 10 polymers containing a systematically varied amount of two different (benzidine-based and phenoxazine-based) aromatic amine comonomers are...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
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Ren, M. (author), Gorier, H. (author), Michels, J.J. (author), Andriessen, H.A.J.M. (author), TNO Industrie en Techniek (author)The roll-to-roll manufacturing process is believed to significantly reduce the cost-price of flexible electronics. Inkjet printing of organic-based inks is a major research topic for flexible electronic applications because of its advantage of non- contact deposition and the ease for patterning for various industrial processes. We herein present...conference paper 2010
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de Kok, M.M. (author), Sarfert, W. (author), Paetzold, R. (author), TNO Industrie en Techniek (author)Colour tuning of white polymer light emitting diode (LED) light sources can be attained by various methods at various stages in the production process of the lamps and/or by the design of the active material incorporated in the LEDs. In this contribution we will describe the methods and discuss the physical background of colour tuning....article 2010
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Mikhnenko, O.V. (author), Cordella, F. (author), Sieval, A.B. (author), Hummelen, J.C. (author), Blom, P.W.M. (author), Loi, M.A. (author), TNO Industrie en Techniek (author)Polymer-fullerene bilayer heterostructures are suited to study excitonic processes in conjugated polymers. Excitons are efficiently quenched at the polymer-fullerene interface, whereas the polymer-vacuum interface is often considered as an exciton-reflecting interface. Here, we report about efficient exciton quenching close to the polymer-vacuum...article 2009
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Michels, J.J. (author), de Winter, S.H.P.M. (author), Symonds, L.H.G. (author), TNO Industrie en Techniek (author)We demonstrate that artificial neural network modeling is a viable tool to predict the processing dependence of gravure printed light-emitting polymer layers for flexible OLED lighting applications. The (local) thickness of gravure printed light-emitting polymer (LEP) layers was analyzed using microdensitometry, after which the data was used to...article 2009
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Heremans, P. (author), Genoe, J. (author), Steudel, S. (author), Myny, K. (author), Smout, S. (author), Vicca, P. (author), Grillberger, C. (author), Hild, O.R. (author), Furthner, F. (author), van der Putten, B. (author), Tripathi, A.K. (author), Gelinck, G.H. (author), TNO Industrie en Techniek (author)We present our recent achievements in organic semiconductor technology in two emerging application areas. We show that the performance of our technology approaches the requirements for Electronic Product Coding RFID tags. Also, backplanes of OLED displays are enabled by the unique compatibility of pentacene transistors with high-k gate...conference paper 2009
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Gielen, A.W.J. (author), Barink, M. (author), van de Brand, J. (author), van Mol, A.M.B. (author), TNO Industrie en Techniek (author)In order to study the electrical-thermo-mechanical interaction in OLEDs, finite element based simulation models were developed. Two dimensional models were used to study detailed design effects, such as the location of the bus bars, while a three dimensional model was used to study the effect of differences between the two and three dimensional...conference paper 2009
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TNO Industrie en Techniek (author), Harkema, S. (author), Mennema, S. (author), Barink, M. (author), Rooms, H.C.A. (author), Wilsona, J.S. (author), van Mol, A.M.B. (author), Bollen, D. (author)We demonstrate the feasibility of white organic light-emitting diodes that exclude the transparent conductor indium-tinoxide. Instead, a highly conductive Orgacon™ PEDOT:PSS material in combination with a metal support structure is used as transparent anode and hole-injection layer. The PEDOT:PSS exhibits a conductivity of 460±20 S/cm and a work...conference paper 2009
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TNO Industrie en Techniek (author), Barbu, I. (author), Ivan, M.G. (author), Giesen, P.T.M. (author), van de Moosdijk, M. (author), Meinders, E.R. (author)Organic flexible electronics is an emerging technology with huge potential growth in the future which is likely to open up a complete new series of potential applications such as flexible OLED-based displays, urban commercial signage, and flexible electronic paper. The transistor is the fundamental building block of all these applications. A key...conference paper 2009
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van den Brand, J. (author), de Baets, J. (author), van Mol, A.M.B. (author), Dietzel, A.H. (author), TNO Industrie en Techniek (author)Systems-in-foil are a new class of electronics in which a full system is integrated into a flexible end product. In this paper, we discuss current research activities and state-of-the-art in this field. Furthermore, some of the associated and expected reliability issues will be addressed on the basis of three examples. As a first example we...article 2008
Searched for: subject%3A%22Organic%255C%2Blight%255C-emitting%255C%2Bdiodes%22
(21 - 40 of 44)