Searched for: department:"Electrical%5C+Sustainable%5C+Energy"
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Jäger, K. (author)
Nano-textured interfaces between two media of different refractive indices scatter light. The angular distribution and the intensity of the scattered light are deter- mined by the geometry of the nano-textures and the difference of the refractive indices of the two media. Thin-film silicon solar cells (TFSSC), which convert sunlight directly...
doctoral thesis 2012
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Isabella, O. (author), Battaglia, C. (author), Ballif, C. (author), Zeman, M. (author)
Nano-scale randomly textured front transparent oxides are superposed on micro-scale etched glass substrates to form modulated surface textures. The resulting enhanced light scattering is implemented in single and double junction thin-film silicon solar cells.
conference paper 2012
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Isabella, O. (author), Elshinawy, M.A.A. (author), Solntsev, S. (author), Zeman, M. (author)
Superstrate thin-film silicon triple-junction solar cells on 2-D gratings were optimized using opto-electrical modeling. Tuning the thickness of intermediate and back reflectors and the band gap of the middle cell resulted in 17% initial efficiency.
conference paper 2012
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Van der Pijl, F.F.A. (author)
The thesis considers contactless electromagnetic energy transfer, applied to residential and office environments. The objective is to investigate and design a (partially) contactless residential energy distribution network system for multiple electrical devices with a highly improved end-user flexibility. A special focus is system efficiency.
doctoral thesis 2012
document
Electrical Sustainable Energy Department (author)
This deliverable presents the results of the first common workshop, co-organized by UMBRELLA and iTesla projects. The workshop title is ‘Innovative tools needed for future and stable system operation’. The main focus of this common workshop is on the information exchange about the objectives, dissemination, key drivers of UMBRELLA and iTesla and...
report 2012
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Roest, S.J.M. (author)
Solar simulator comprising at least at least one high-intensity discharge (HID) lamp type,and at least one halogen lamp type, which lamps are applied simultaneously and are provided with infrared filter means to provide a mixture of light approximating radiated sunlight,wherein the infrared filter means are embodied as heat reflective foil...
patent 2012
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Jassal, A.K. (author), Polinder, H. (author), Damen, M.E.C. (author), Versteegh, K. (author)
Permanent Magnet Direct Drive (PMDD) generators offer very high force density, high efficiency and low number of components. Due to these advantages, PMDD generators are getting popular in the wind energy industry especially for offshore application. Presence of permanent magnets gives magnetic field for free but there are many design...
journal article 2012
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Pharmatrisanti, A. (author)
For the past two decades, electricity utilities have struggled to provide high quality electrical power to their customers while keeping on spending effectively the expenses for operating and maintaining the power system. Unfortunately, under tropical conditions, operation circumstances affect the equipment so that either its lifetime is cut...
doctoral thesis 2012
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Smit, J.J. (author), Andritsch, T. (author), Chevtchenko, O.A. (author)
Assets in high voltage technology have to meet harsh service conditions over long lifetimes of 40 years or more. Due to environmental concerns, substitution of conventional insulating materials becomes a necessity. Because robustness and sustainability are serious requirements, only few new materials are really breaking through. At present some...
journal article 2012
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De Haan, V.O. (author), Santbergen, R. (author), Tijssen, M. (author), Zeman, M. (author)
Optical standing wave sensors have been manufactured by amorphous silicon deposition. The responses of these sensors, when subjected to standing waves, have been calculated and measured. It is shown that the responses are different depending on the way the standing wave is created. The responses also depend on the thickness and material...
journal article 2012
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Scorticati, D. (author), Skolski, J.Z.P. (author), Romer, G.R.B.E. (author), Huis in 't Veld, A.J. (author), Workum, M.J. (author), Theelen, M.J. (author), Zeman, M. (author)
In this work, we studied the feasibility of surface texturing of thin molybdenum layers on a borosilicate glass substrate with Ultra-Short Laser Pulses (USLP). Large areas of regular diffraction gratings were produced consisting of Laserinduced periodic surface structures (LIPSS). A short pulsed laser source (230 fs-10 ps) was applied using a...
conference paper 2012
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Maggiore, B. (author), Rawn, B.G. (author), Lehn, P. (author)
The problem of determining invariance kernels for planar single-input nonlinear systems is considered. If K is a closed set, its invariance kernel is the largest subset of K with the property of being positively invariant for arbitrary measurable input signals. It is shown that the boundary of the invariance kernel is a concatenation of...
journal article 2012
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Jäger, K. (author), Fischer, M. (author), Van Swaaij, R.A.C.M.M. (author), Zeman, M. (author)
We present a scattering model based on the scalar scattering theory that allows estimating far field scattering properties in both transmission and reflection for nano-textured interfaces. We first discuss the theoretical formulation of the scattering model and validate it for nano-textures with different morphologies. Second, we combine the...
journal article 2012
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Electrical Sustainable Energy Department (author)
In the present deliverable, the dissemination strategy of the UMBRELLA project is discussed. The strategy is focused on the website, newsletter, workshops and attendance of conferences.
report 2012
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Agbo, S.N. (author)
The need for electrical energy is growing fast as a result of the expanding world population and economic activities. On top of this the energy need of each individual is also growing. At present the growth in energy demand is not matched by the growth in energy generation because of insufficient energy production. This energy gap therefore...
doctoral thesis 2012
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Kind, R. (author), Van Swaaij, R.A.C.M.M. (author), Rubinelli, F.A. (author), Solntsev, S. (author), Zeman, M. (author)
The performance of hydrogenated amorphous silicon (a-Si:H) p-i-n solar cells is limited, as they contain a relatively high concentration of defects. The dark current voltage (JV) characteristics at low forward voltages of these devices are dominated by recombination processes. The recombination rate depends on the concentration of active...
journal article 2011
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Xyngi, I. (author)
doctoral thesis 2011
document
Jarolimek, K. (author)
Crystalline silicon is probably the best studied material, widely used by the semiconductor industry. The subject of this thesis is an intriguing form of this element namely amorphous silicon. It can contain a varying amount of hydrogen and is denoted as a-Si:H. It completely lacks the neat long range order of the crystal, yet its structure is...
doctoral thesis 2011
document
De Haan, V. (author), Santbergen, R. (author), Tijssen, M. (author), Zeman, M. (author)
A study is presented giving the response of three types of fiber-optic interferometers by which a standing wave through an object is investigated. The three types are a Sagnac, Mach–Zehnder and Michelson–Morley interferometer. The response of the Mach–Zehnder interferometer is similar to the Sagnac interferometer. However, the Sagnac...
journal article 2011
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Schulte, M. (author), Bittkau, K. (author), Jäger, K. (author), Ermes, M. (author), Zeman, M. (author), Pieters, B.E. (author)
Textured interfaces in thin-film silicon solar cells improve the efficiency by light scattering. A technique to get experimental access to the angular intensity distribution (AID) at textured interfaces of the transparent conductive oxide (TCO) and silicon is introduced. Measurements are performed on a sample with polished microcrystalline...
journal article 2011
Searched for: department:"Electrical%5C+Sustainable%5C+Energy"
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