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Zhang, H. (author), Schlangen, E. (author), Savija, B. (author)
Cement paste is the glue that holds concrete together and any improvements in material performance will come from its microstructure. For better understanding and predicting its elastic properties and fracture performance, more and more studies are carried out based on micromechanics simulations. However, the predicted results can be hardly...
conference paper 2018
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Gupta, D.K. (author), Barink, M. (author), Langelaar, M. (author)
Concentrated photovoltaics (CPV) has recently gained popularity due to its ability to deliver significantly more power at relatively lower absorber material costs. In CPVs, lenses and mirrors are used to concentrate illumination over a small solar cell, thereby increasing the incident light by several folds. This leads to non-uniform...
article 2018
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Gezici-Koç, Ö. (author), Erich, S.J.F. (author), Huinink, H.P. (author), van der Ven, L.G.J. (author), Adan, O.C.G. (author)
An important reason to apply coatings on wood is to protect wood against moisture. As a result of regulations and ecological concerns, there has been a shift towards waterborne coatings, which make coatings intrinsically more sensitive to water. As a consequence of the higher sensitivity to water, the durability of both wood and coatings can be...
article 2018
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de Amorim Soares, G. (author), Theelen, M.J. (author), Roosen, D. (author), Masolin, A. (author), Franssen, L. (author), Daenen, M. (author), Carolus, J. (author), Meuris, M. (author), Birrenbach, T. (author), Gerber, A. (author), Wrigley, A. (author)
conference paper 2017
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van Deelen, J. (author), Tezsevin, Y. (author), Barink, M. (author)
Most research of texturization of solar cells has been devoted to Si based cells. For perovskites, it was assumed that texturization would not have much of an impact because of the relatively low refractive indexes lead to relatively low reflection as compared to the Si based cells. However, our optical modeling shows that a significant gain in...
article 2017
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Roozeboom, F. (author), Lankhorst, A.M. (author), Poodt, P.W.G. (author), Koster, N.B. (author), Winands, G.J.J. (author), Vermeer, A.J.P.M. (author)
The invention relates to an apparatus for reactive ion etching of a substrate, comprising: a plasma etch zone including an etch gas supply and arranged with a plasma generating structure for igniting a plasma and comprising an electrode structure arranged to accelerate the etch plasma toward a substrate portion to have ions impinge on the...
patent 2017
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Mann, D. (author), Voogt, S. (author), Keul, H. (author), Möller, M. (author), Verheijen, M. (author), Buskens, P. (author)
Janus particles are of great research interest because of their reduced symmetry, which provides them with unique physical and chemical properties. Such particles can be prepared from spherical structures through colloidal assembly. Whilst colloidal assembly has the potential to be a low cost and scalable process, it typically lacks selectivity....
article 2017
document
van Deelen, J. (author), Barink, M. (author)
Metallization of the front contact can increase the conductivity. We show the optical benefit by combining nanowire with a texture of the thin film stack. The parallel nanowires are placed in crevices of a texture in the optical model. Texturization reduces the reflection of both the stack and the nanowire. For a period of 500 nm, the reflection...
conference paper 2017
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van Deelen, J. (author), Frijters, C. (author)
We have investigated the benefit of a patterned metallization on top of a transparent conductive oxide in CIGS thin-film solar panels. It was found that cells with a grid have a higher efficiency compared to cells with only a TCO. This was observed for all cell lengths used. Furthermore, metallic grids enable increase of the cell length up to 10...
article 2017
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Granneman, S.J.C. (author), Shahidzadeh, N. (author), Lubelli, B.A. (author), van Hees, R.P.J. (author)
Borax has been identified as a possible crystallization modifier for sodium sulfate. Understanding the effect of borax on factors influencing transport and crystallization kinetics of sodium sulfate helps to clarify how this modifier might limit crystallization damage. It has been observed that the addition of borax to sodium sulfate solutions...
article 2017
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Theelen, M. (author), de Amorim Soares, G. (author), Beyeler, K. (author), Steijvers, H. (author), Barreau, N. (author)
Unpackaged CIGS solar cells were simultaneously exposed to illumination and either dry heat, damp heat or dry cold followed by thermal cycling. In-situ monitoring of their electrical parameters demonstrated a rapid decrease of the efficiency for the solar cells exposed to damp heat plus illumination. This decrease was mainly driven by changes in...
conference paper 2017
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van Deelen, J. (author), Omar, A. (author), Barink, M. (author)
The conductivity of transparent front contacts can be improved by patterned metallic nanowires, albeit at the cost of optical loss. The associated optical penalty can be strongly reduced by texturization of the cell stack. Remarkably, the nanowires themselves are not textured and not covered in our design. This was shown by optical modeling...
article 2017
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van Deelen, J. (author), Barink, M. (author)
Innovation in the field of thin-film cells, in addition to economy of scale and the manufacturing learning curve, is an important element in keeping the price of this technology competitive. Most papers on these cells focus on their technology; however, the economic potential of the technology is also important. Of even greater significance, a...
article 2017
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Turkenburg, D.H. (author), Durant, Y. (author), Fischer, H.R. (author)
Stimulated by the growing demand for greener and more sustainable polymer systems we have studied thermoreversible polymer networks composed largely (> 83% w/w) of diethylitaconate of bio-based origin. A series of coating materials has been synthesized consisting of linear chains of diethylitaconate copolymerized with furfurylmethacrylate...
article 2017
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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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Illiberi, A. (author), Katsouras, I. (author), Gazibegovic, S. (author), Cobb, B. (author), Nekovic, E. (author), van Boekel, W. (author), Frijters, C. (author), Maas, J. (author), Roozeboom, F. (author), Creyghton, Y. (author), Poodt, P. (author), Gelinkck, G. (author)
public lecture 2017
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van Deelen, J. (author)
For a wide range of bandgaps of solar cell materials, the potential contribution of upconversion materials was calculated and related to various configurations of the solar cell and upconversion layers. Moreover, by comparing these various strategies with the potential of a dual junction tandem cell configuration, a compelling case is made for...
article 2017
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Rocha, I.B.C.M. (author), Raijmaekers, S. (author), van der Meer, F.P. (author), Nijssen, R.P.L. (author), Fischer, H.R. (author), Sluys, L.J. (author)
A combined experimental and numerical investigation is conducted on the anisotropic water diffusion behaviour of unidirectional glass/epoxy composites. Experimental diffusivity values are obtained by immersing thin material slices for each of its planes of orthotropy extracted from a thick composite panel and interphase measurements are...
article 2017
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Martín, J. (author), Zhao, D. (author), Lenz, T. (author), Katsouras, I. (author), de Leeuw, D.M. (author), Stingelin, N. (author)
Poly(vinylidene fluoride) (PVDF) has long been regarded as an ideal piezoelectric 'plastic' because it exhibits a large piezoelectric response and a high thermal stability. However, the realization of piezoelectric PVDF elements has proven to be problematic due to, amongst other reasons, the lack of industrially scalable methods to process PVDF...
article 2017
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Nijland, T.G. (author)
De Noordersluis bij IJmuiden is één van de grote infrastructurele werken in vooroorlogs Nederland, uitgevoerd in beton (Fig. 1). De bouw van de nieuwe sluis was onderdeel van een reeks verbeteringen aan het Noordzeekanaal: In 1909 was een staatscommissie ingesteld '(om)dat opnieuw de vraag rees of de belangen van Nederland in het algemeen en van...
conference paper 2017
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