Searched for: author:"Hovestad, A."
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Theelen, M.J. (author), Schiepers, E. (author), Vermeer, J. (author), Falk, S. (author), Hovestad, A. (author), Steijvers, H.L.A.H. (author), van der Vleuten, M. (author), Bakker, K. (author), Dörenkämper, M. (author), Linden, H. (author)
Two step atmospheric pressure processing of Cu(In,Ga)(Se,S)2 absorbers is an industrially attractive technology to produce CIGS thin film modules. For this procedure, absorber sulfurization is required to increase the Voc and thus the efficiency of the solar cells. Raman spectroscopy was used to qualitatively identify the presence of sulfur on...
conference paper 2018
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Theelen, M. (author), Harel, S. (author), Verschuren, M. (author), Tomassini, M. (author), Hovestad, A. (author), Barreau, N. (author), van Berkum, J. (author), Vroon, Z. (author), Zeman, M. (author)
The degradation behavior of Mo/MoSe2 layers have been investigated using damp heat exposure. The two studied molybdenum based films with different densities and microstructures were obtained by lifting off Cu(In,Ga)Se2 layers froma bilayer molybdenum stack on soda lime glass. Hereby, a glass/Mo/MoSe2 was obtained, which resembles the back...
conference paper 2015
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Hovestad, A. (author), Bressers, P.M.M.C. (author), Meertens, R.M. (author), Frijters, C.H. (author), Voorthuijzen, W.P. (author)
High yield and reproducible production is a major challenge in up-scaling thin film Cu(In,Ga)Se2(CIGS) solar cells to large area roll-to-roll industrial manufacturing. Pinholes enabling Ohmic contact between the ZnO:Al front-contact and Mo back contact of the CIGS cell create electrical shunts that are detrimental to the output of the cell and...
article 2015
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van Deelen, J. (author), Barink, M. (author), Klerk, L. (author), Voorthuijzen, P. (author), Hovestad, A. (author)
Modeling indicates a potential efficiency boost of 17% if thin-film solar panels are featured with a metallic grid. Variations of transparent conductive oxide sheet resistance, cell length, and grid dimensions are discussed. These parameters were optimized simultaneously to obtain the best result. Moreover, the power output as a function of...
article 2015
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van Deelen, J. (author), Barink, M. (author), Klerk, L. (author), Voorthuijzen, P. (author), Hovestad, A. (author)
Most development work in the laboratory is dedicated to efficiency enhancements at the cell level; improvements in efficiency can lead to higher cost-competitiveness of PV. However, the cost of panel manufacturing is an important aspect as well. For CIGS panels the deposition of the active layer is an important part of the cost, and decreasing...
article 2015
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van Deelen, J. (author), Klerk, L.A. (author), Barink, M. (author), Rendering, H. (author), Voorthuijzen, P. (author), Hovestad, A. (author)
The trade-off between transparency and conductivity in transparent conductors used in optoelectronic devices is a major bottleneck towards higher device performances. Grid deposition on transparent conductive oxides was demonstrated using electrochemical deposition, which has the advantage of a high aspect ratio of 0.45 and the possibility to...
article 2014
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van Deelen, J. (author), Klerk, L.A. (author), Barink, M. (author), Rendering, H. (author), Voorthuijzen, P. (author), Hovestad, A. (author)
The trade-off between transparency and conductivity in transparent conductors used in optoelectronic devices is a major bottleneck towards higher device performances. Grid deposition on transparent conductive oxides was demonstrated using electrochemical deposition, which has the advantage of a high aspect ratio of 0.45 and the possibility to...
article 2013
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van Deelen, J. (author), Illiberi, A. (author), Hovestad, A. (author), Barbu, I. (author), Klerk, L. (author), Buskens, P. (author), TNO, Department of Thin Film Technologies, De Rondom 1, 5612 AP Eindhoven, Netherlands (author)
An overview of different transparent conductors is given. In addition, atmospheric pressure CVD of ZnO resulted in conductivities below 1 mΩ cm for a temperature of 480°C, whereas at a process temperature of 200°C a value of 2 mΩ cm was obtained. Also atmospheric pressure spatial ALD was used to make conductive ZnO. Furthermore, the properties...
conference paper 2012
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van Deelen, J. (author), Rendering, H. (author), Klerk, L. (author), Hovestad, A. (author)
conference paper 2012
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Hovestad, A. (author), Rendering, H. (author), Maijenburg, A.W. (author)
Microcontact printing combined with electroless deposition is a potential low cost technique to make electrical interconnects for opto-electronic devices. Microcontact printed inhibitors locally prevent electroless deposition resulting in a pre-defined pattern of metal tracks. The inhibition of electroless Ni deposition on Pd-seeds and on indium...
article 2012
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van Deelen, J. (author), Rendering, H. (author), 't Mannetje, H.H. (author), Klerk, L. (author), Hovestad, A. (author)
At present, transparent conducting oxides (TCOs) are still superior in performance to most other transparent conductors. Results on opto-electronic modeling and design optimization of TCOs are presented using a monolithically integrated CIGS cell configuration as case. For various cell dimensions and TCO characteristics, the cell output was...
conference paper 2012
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van Deelen, J. (author), Rendering, H. (author), Hovestad, A. (author)
Alternatives to ITO are under heavy investigation. Organic and inorganic transparent conducting materials are compared based on their transparency versus sheet resistance characteristics. Although graphene has advanced recently, TCOs are still superior in performance and can only be surpassed by the combination of transparent materials with a...
conference paper 2012
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van Deelen, J. (author), Rendering, H. (author), het Mannetje, H. (author), Klerk, L. (author), Hovestad, A. (author)
At present, transparent conducting oxides (TCOs) are still superior in performance to most other transparent conductors. Results on opto-electronic modeling and design optimization of TCOs are presented using a monolithically integrated CIGS cell configuration as case. For various cell dimensions and TCO characteristics, the cell output was...
conference paper 2012
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van Deelen, J. (author), Rendering, H. (author), 't Mannetje, H.H. (author), Hovestad, A. (author)
Various transparent conducting materials are compared based on their transparency versus sheet resistance characteristics. At present, transparent conducting oxides (TCOs) are still superior in performance compared to various recent alternatives and can only be surpassed by the combination of TCOs with a metal grid. Results on modeling and...
conference paper 2011
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Mol, J.M.C. (author), Lodhi, Z.F. (author), Hovestad, A. (author), 't Hoen-Velterop, L. (author), Terryn, H. (author), de Wit, J.H.W. (author)
Cadmium (Cd) has been extensively used as an excellent corrosion protective coating for steel components in aerospace, automotive, electrical and fasteners industries. However, Cd is banned due to its toxic nature and strict environmental regulations. In this study, the electrodeposition mechanism and kinetics, coating morphology and corrosion...
bookPart 2011
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Turkenburg, D.H. (author), Rendering, H. (author), Hovestad, A. (author), Stroeks, N. (author), Maury, P. (author), Moonen, P. (author), Huskens, J. (author), Barbu, I. (author), Meinders, E.R. (author)
We report a novel method to selectively deposit materials from solution into imprinted micro-capillaries. Dewetting of the solvent just outside the capillaries is balanced to evaporation inside the capillaries. In this way conductive u-wires can be self-assembled and self-aligned on flexible substrates opening the route to faster and cheaper...
article 2011
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Mol, J.M.C. (author), Lodhi, Z.F. (author), Hovestad, A. (author), 't Hoen-Velterop, L. (author), Terryn, H. (author), de Wit, J.H.W. (author)
Cadmium (Cd) has been extensively used as an excellent corrosion protective coating for steel components in aerospace, automotive, electrical and fasteners industries. However, Cd is banned due to its toxic nature and strict environmental regulations. In this study, the electrodeposition mechanism and kinetics, coating morphology and corrosion...
bookPart 2010
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Hovestad, A. (author), Rendering, H. (author), Peter, M. (author), Meinders, E.R. (author), TNO Industrie en Techniek (author)
In many flexible electronic devices transparent conductive oxide (TCO) window layers are used for current collection. The trade-off between the electrical resistance and optical transmission of TCOs results in power losses. Increasing the electrical conductivity by combining metallic grids with TCOs enables reduction of these power losses....
conference paper 2010
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Hovestad, A. (author), TNO Industrie en Techniek (author), IenT (author)
public lecture 2010
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Hovestad, A. (author)
De totale energiebehoefte van de huidige wereldbevolking is 12-15 terawatt ofwel honderdduizend miljard kilowattuur per jaar. Er zijn maar vijf energiebronnen – olie, gas, kolen, nucleaire brandstof en de zon – die aan deze energiebehoefte kunnen voldoen. Van deze energiebronnen heeft zonne-energie in theorie de grootste potentie. De energie van...
article 2010
Searched for: author:"Hovestad, A."
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