Searched for: subject:"Barriers"
(1 - 15 of 15)
document
Kuntze, T. (author), Wollmann, P. (author), Fledderus, H. (author)
The proper long term operation of organic electronic devices like organic photovoltaics OPV depends on their resistance to environmental influences such as permeation of water vapor. Major efforts are spent to encapsulate OPV. State of the art is sandwich-like encapsulation between two ultra-barrier foils. Sandwich encapsulation faces two major...
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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Perrotta, A. (author), García, S.J. (author), Michels, J.J. (author), Andringa, A.M. (author), Creatore, M. (author)
Water permeation in inorganic moisture permeation barriers occurs through macroscale defects/pinholes and nanopores, the latter with size approaching the water kinetic diameter (0.27 nm). Both permeation paths can be identified by the calcium test, i.e., a time-consuming and expensive optical method for determining the water vapor transmission...
article 2015
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Li, F. (author), Smits, E. (author), van Leuken, L. (author), Haas, D.G. (author), Ellis, T. (author), van der Steen, J.L. (author), Tripathi, A.K. (author), Myny, K. (author), Ameys, M. (author), Schols, S. (author), Heremans, P. (author), Gelinck, G.H. (author)
AMOLED displays using oxide TFTs and high-quality moisture barrier were fabricated on ultrathin, flexible plastic substrates to give maximum mechanical flexibility. Total display thickness is below 150μm, and repeated rollability at 1 cm roll radius has been demonstrated. Electrical/Mechanical characteristics and reliability of the flexible...
article 2014
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Van Assche, F.J.H. (author), Unnikrishnan, S. (author), Michels, J.J. (author), van Mol, A.M.B. (author), van de Weijer, P. (author), van de Sanden, M.C.M. (author), Creatore, M. (author)
We report on a low substrate temperature (110°C) remote microwave plasma-enhanced chemical vapor deposition (PECVD) process of silicon nitride barrier layers against moisture permeation for organic light emitting diodes (OLEDs) and other moisture sensitive devices such as organic photovoltaic cells (OPVs). Specifically, the influence of the SiH4...
article 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
document
Michels, J.J. (author), Peter, M. (author), Salem, A. (author), van Remoortere, B. (author), van den Brand, J. (author)
This paper presents a thorough experimental and theoretical analysis of a model system for the mechanism of cathode degradation in OLED and OPV devices due to lateral side ingress of water vapour into laminated thin film barrier structures. The experimental procedure allows for full quantitative control over layer dimensions of the laminate, as...
article 2014
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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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Brondijk, J.J. (author), Torricelli, F. (author), Smits, E.C.P. (author), Blom, P.W.M. (author), de Leeuw, D.M. (author)
The charge injection barriers in organic field-effect transistors (OFETs) seem to be far less critical as compared to organic light-emitting diodes (OLEDs). Counter intuitively, we show that the origin is image-force lowering of the barrier due to the gate bias at the source contact, although the corresponding gate field is perpendicular to the...
article 2012
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Kemerink, M. (author), Asadi, K. (author), Blom, P.W.M. (author), de Leeuw, D.M. (author)
The availability of a reliable memory element is crucial for the fabrication of 'plastic' logic circuits. We use numerical simulations to show that the switching mechanism of ferroelectric-driven organic resistive switches is the stray field of the polarized ferroelectric phase. The stray field modulates the charge injection from a metallic...
article 2012
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Lu, M. (author), de Bruyn, P. (author), Nicolai, H.T. (author), Wetzelaer, G.-J.A.H. (author), Blom, P.W.M. (author)
article 2012
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Gholamrezaie, F. (author), Asadi, K. (author), Kicken, R.A.H.J. (author), Langeveld-Voss, B.M.W. (author), de Leeuw, D.M. (author), Blom, P.W.M. (author)
We investigate the modulation of the charge injection in organic field-effect transistors with self-assembled monolayers (SAMs) using both a bottom-gate and a top-gate geometry. The current modulation by using SAMs is more pronounced in the top-gate geometry due to the better defined upper surface of the bottom source and drain electrodes. By...
article 2011
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Li, X. (author), Smaal, W.T.T. (author), Kjellander, C. (author), van der Putten, B. (author), Gualandris, K. (author), Smits, E.C.P. (author), Anthony, J. (author), Broer, D.J. (author), Blom, P.W.M. (author), Genoe, J. (author), Gelinck, G.H. (author)
We present a systematic study of the influence of material composition and ink-jet processing conditions on the charge transport in bottom-gate field-effect transistors based on blends of 6,13-bis(triisopropyl-silylethynyl) pentacene (TIPS-PEN) and polystyrene. After careful process optimizations of blending ratio and printing temperature we...
article 2011
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Asadi, K. (author), Wildeman, J. (author), Blom, P.W.M. (author), de Leeuw, D.M. (author), TNO Industrie en Techniek (author)
Resistive switches have been fabricated using a phase-separated blend film of ferroelectric random copolymer poly(vinylidene fluoride-co-trifluoroethylene) with the organic semiconductor regio-irregular poly(3-hexylthiophene) (rir-P3HT). Spin-coated blend films have been contacted with symmetrical Ag top and Ag bottom electrodes, yielding...
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
Searched for: subject:"Barriers"
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