Searched for: subject%3A%22Light%255C%2Bemission%22
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Muhammed, M.A.H. (author), Lamers, M. (author), Baumann, V. (author), Dey, P. (author), Blanch, A.J. (author), Polishchuk, I. (author), Kong, X.T. (author), Levy, D. (author), Urban, A.S. (author), Govorov, A.O. (author), Pokroy, B. (author), Rodríguez-Fernández, J. (author), Feldmann, J. (author)
Elucidating the underlying principles behind band gap engineering is paramount for the successful implementation of semiconductors in photonic and optoelectronic devices. Recently it has been shown that the band gap of a wide and direct band gap semiconductor, such as ZnO, can be modified upon cocrystallization with amino acids, with the role of...
article 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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Li, L. (author), van Breemen, A.J.J.M. (author), Khikhlovskyi, V. (author), Smits, E.C.P. (author), Kemerink, M. (author), Broer, D.J. (author), Gelinck, G.H. (author)
article 2012
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Lai, W.-Y. (author), Balfour, M.N. (author), Levell, J.W. (author), Bansal, A.K. (author), Burn, P.L. (author), Lo, S.-C. (author), Samuel, I.D.W. (author)
Phosphorescent poly(dendrimers) with a norbornene-derived backbone have been synthesized using ring-opening metathesis polymerization with the Grubbs III catalyst. The dendrimers are comprised of a heteroleptic iridium(III) complex core with two 2-phenylpyridyl ligands and a phenyltriazolyl ligand, biphenyl-based dendrons, and 2-ethylhexyloxy...
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), Nicolai, H.T. (author), Lenes, M. (author), Wetzelaer, G.-J.A.H. (author), Lu, M. (author), Blom, P.W.M. (author)
The recombination processes in poly(p -phenylene vinylene) based polymer light-emitting diodes (PLEDs) are investigated. Photogenerated current measurements on PLED device structures reveal that next to the known Langevin recombination also trap-assisted recombination is an important recombination channel in PLEDs, which has not been considered...
article 2011
document
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
document
Lu, M. (author), Nicolai, H.T. (author), Kuik, M. (author), Wetzelaer, G.-J.A.H. (author), Wildeman, J. (author), Palmaerts, A. (author), Blom, P.W.M. (author)
We demonstrate a solution processed bi-layer PLED based on poly(p-phenylene vinylene) derivatives using orthogonal solvents. To lower the voltage drop the hole transport layer (HTL) based on poly[2,5-bis(2-ethylhexyloxy)-co-2,5- bis(butoxy)-1,4-phenylenevinylene] (BEH/BB-PPV (1:3)) is doped with tetracyano-tetrafluoro-quinodimethane (F4TCNQ)....
article 2011
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Craciun, N.I. (author), Wildeman, J. (author), Blom, P.W.M. (author), TNO Industrie en Techniek (author)
We report on the synthesis and electrical characterization of polyfluorene-triarylamine-based hole transport layers (HTLs). The solubility of the HTL can be tuned by adjustment of the chemical structure without loss of the charge transport properties. Double-layer polymer light-emitting diodes are constructed with an HTL that is not soluble in...
article 2010
document
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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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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Klein-Douwel, R.J.H. (author), Donkerbroek, A.J. (author), van Vliet, A.P. (author), Boot, M.D. (author), Somers, L.M.T. (author), Baert, R.S.G. (author), Dam, N.J. (author), ter Meulen, J.J. (author), TNO Industrie en Techniek (author)
High-speed imaging, spectroscopy and thermodynamical characterization are applied to an optically accessible, heavy-duty diesel engine in order to compare sooting and chemiluminescence behaviour of bio-derived, oxygenated fuels and various reference fuels. The fuels concerned include the bio-derived fuels Jatropha oil (pure), Jatropha...
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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Veldman, D. (author), Ipek, Ö. (author), Meskers, S.C.J. (author), Sweelssen, J. (author), Koetse, M.M. (author), Veenstra, S.C. (author), Kroon, J.M. (author), van Bavel, S.S. (author), Loos, J. (author), Janssen, R.A.J. (author), TNO Industrie en Techniek (author)
The electro-optical properties of thin films of electron donor-acceptor blends of a fluorene copolymer (PF10TBT) and a fullerene derivative (PCBM) were studied. Transmission electron microscopy shows that in these films nanocrystalline PCBM clusters are formed at high PCBM content. For all concentrations, a charge transfer (CT) transition is...
article 2008
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van 't Ooster, A. (author), van Henten, E.J. (author), Janssen, E.G.O.N. (author), Bongaerts, E. (author), TNO Bouw en Ondergrond (author)
Discomfort caused by light pollution from greenhouses that apply supplementary lighting is an issue in Dutch society nowadays. At this moment Dutch legislation requires an opaque screen that reduces light transmission of the greenhouse wall by 95%. In 2008 also the light transmission of the greenhouse roof must be reduced equally and...
conference paper 2008
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TNO Fysisch en Elektronisch Laboratorium (author), Zeisse, C. (author), Gathman, S.G. (author), Jensen, D.R. (author), Littfin, K. (author), Moision, B. (author), Davidson, K.L. (author), Frederickson, P.A. (author), de Jong, A.N. (author), Fritz, P.J. (author), de Leeuw, G. (author), Luc Forand, J. (author), Dion, D. (author)
An analysis is presented showing the effects of molecules and aerosols on atmospheric transmission data obtained during the Electro-Optical Propagation Assessment in Coastal Environments (EOPACE) campaign carried out in San Diego during March and April, 1996. Mid wave infrared transmission was measured over San Diego Bay along a 14.9 km path and...
conference paper 1997
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TNO Fysisch en Elektronisch Laboratorium (author), Jacobs, P.A. (author)
The detectability of a target in the infrared spectral region is determined by differences between the radiative signatures of the target and the local background. This implies that both, the difference in surface temperature and emissivity ΔT resp. Δε and the distribution of these differences over the target area and the background, are of...
conference paper 1995
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