7 results on '"Pélisset S."'
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2. The Right Way To Characterize Adhesion Of Polymers In PV Modules
- Author
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Chapuis, V., Pélisset, S., Trachsel, V., Raeis-Barneoud, M., Ballif, C., and Perret-Aebi, L.-E.
- Subjects
Thin Film Solar Cells ,Amorphous and Microcrystalline Silicon Solar Cells - Abstract
26th European Photovoltaic Solar Energy Conference and Exhibition; 2597-2599, It is widely accepted that adherence (which reports to what is measured when performing an adhesion test) of the encapsulant to the main substrates of the module plays a key role in the long term reliability of the PV module. Consequently, adherence is commonly measured and used to assess or compare encapsulant compatibility with a given substrate. The most common procedures used in the PV field to characterize adhesion between a polymer film and a substrate are the so called peeling test, lap shear and compressive shear tests. Here we use a compressive shear setup to characterize the adherence of Poly Vinyl Butyral (PVB) and Polyethylene-covinyl acetate (EVA) to glass before and after degradation in damp-heat (DH) conditions (85°C, 85%RH). The adherence metrics that can be derived from a Compressive Shear Test (CST) are presented and discussed. We show that a single metric is not sufficient to characterize adherence and that a set of at least two indicators including the peak shear stress and the viscous dissipation should be used. Using this set it is found that the interface PVB/Glass is more affected by the degradation than the EVA/Glass interface. more...
- Published
- 2011
- Full Text
- View/download PDF
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3. Monitoring water vapour penetration using a contactless technique
- Author
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Pélisset, S., Théron, R., Barnéoud-Raéis, M., Perret-Aebi, L.-E., Benkhaira, M., and Ballif, C.
- Subjects
monitoring ,TCO ,PV Modules ,moisture ,Components for PV Systems ,diffusion - Abstract
24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 3561-3564, Some layers of thin film photovoltaic modules maybe critically sensitive to moisture. In this study we present a new tool for monitoring the effect of moisture using a particular Transparent Conductive Oxide (TCO) as a sensor. The moisture content of the encapsulant was determined by Fourier Transform Infra Red (FTIR) spectroscopic measurements. The TCO resistivity was measured using an inductive method. The different spectroscopic results show that the diffusion of water vapour in the encapsulant used in this study is in good agreement with Fick’s law and correlate well with the increase of resistivity of the TCO. However, the transport measurements bring evidence for a degradation of the TCO resistivity undetectable by conventional FTIR measurements. more...
4. Efficiency of silicon thin-film photovoltaic modules with a front coloured glass
- Author
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Pélisset, S., Joly, M., Chapuis, V., Schueler, A., Mertin, S., Hody-Le Caër, V., Ballif, C., and Perret-Aebi, L.-E.
- Abstract
Photovoltaic electricity has already proven its ability to compete with other well established technologies for energy production. The abundant and non-toxic raw materials, the yearly increasing efficiency as well as the production cost of silicon thin-film solar cells getting lower and lower make this technology always more interesting for a wide spread use. Beside the functional features, the size, colour and glass texture of a PV module determine its appearance and aesthetics. In order to be more compliant with the built environment, photovoltaic installations have to be improved in terms of visual rendering, matching of colour of the existing roof-tops and parasitic reflections. The crystalline technology already offers various types of systems with a large choice of shapes, textures and colours as well as “semi-transparent” modules more easily integrated in the roof-tops or facade. By changing the anti-reflective coating (ARC) of a crystalline solar cell, it is possible to modify their colour [1]. However, for thin-film silicon technology the challenge is completely different, and up to now, the only way to modify the module colour is to reduce the thickness of the active layer and consequently its efficiency. Therefore new ways to enhance the visual rendering of the thin-film modules have to be explored. A study led in the frame of the ArchinSolar project [2] has shown that architects are ready to integrate PV modules with enhanced aesthetic aspect, even though there was a 10 % loss in efficiency. The present study shows how new coloured filters can be used to enhance PV modules’ appearance while minimizing power loss, to achieve a better integration in the traditional urban or rural environment. more...
5. Bloch Surface Waves in Open Fabry-Perot Microcavities.
- Author
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Marcucci N, Guo TL, Pélisset S, Roussey M, Grosjean T, and Descrovi E
- Abstract
Thanks to the increasing availability of technologies for thin film deposition, all-dielectric structures are becoming more and more attractive for integrated photonics. As light-matter interactions are involved, Bloch Surface Waves (BSWs) may represent a viable alternative to plasmonic platforms, allowing easy wavelength and polarization manipulation and reduced absorption losses. However, plasmon-based devices operating at an optical and near-infrared frequency have been demonstrated to reach extraordinary field confinement capabilities, with localized mode volumes of down to a few nanometers. Although such levels of energy localization are substantially unattainable with dielectrics, it is possible to operate subwavelength field confinement by employing high-refractive index materials with proper patterning such as, e.g., photonic crystals and metasurfaces. Here, we propose a computational study on the transverse localization of BSWs by means of quasi-flat Fabry-Perot microcavities, which have the advantage of being fully exposed toward the outer environment. These structures are constituted by defected periodic corrugations of a dielectric multilayer top surface. The dispersion and spatial distribution of BSWs' cavity mode are presented. In addition, the hybridization of BSWs with an A exciton in a 2D flake of tungsten disulfide (WS
2 ) is also addressed. We show evidence of strong coupling involving not only propagating BSWs but also localized BSWs, namely, band-edge and cavity modes. more...- Published
- 2023
- Full Text
- View/download PDF
6. Outlook on optical identification of micro- and nanoplastics in aquatic environments.
- Author
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Peiponen KE, Räty J, Ishaq U, Pélisset S, and Ali R
- Subjects
- Environmental Monitoring methods, Environmental Pollution analysis, Nanoparticles analysis, Plastics analysis, Refractometry methods, Spectroscopy, Near-Infrared methods, Water Pollutants, Chemical analysis
- Abstract
Plastic pollution in natural water bodies is an emerging problem that requires quick actions. Recently, the role of micro- and nanoplastics in pollution and health issues has been realized and taken seriously. In this paper, we have studied optical properties, such as NIR spectra and refractive index, of some common plastic materials and present a method and data to screen especially problematic transparent plastics with rough surface in aquatic environments. We also give an outlook of possible optical measurement methods that could be used for detection of micro- and nanoplastics., (Copyright © 2018 Elsevier Ltd. All rights reserved.) more...
- Published
- 2019
- Full Text
- View/download PDF
7. Strip-loaded horizontal slot waveguide.
- Author
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Roussey M, Ahmadi L, Pélisset S, Häyrinen M, Bera A, Kontturi V, Laukkanen J, Vartiainen I, Honkanen S, and Kuittinen M
- Abstract
We introduce a novel concept for an optical waveguide called a strip-loaded slot waveguide. It allows an extraordinary confinement of the field in a waveguide with an extremely tiny (vertical) cross section. Unlike conventional slot waveguides, the proposed configuration has potential for very low propagation losses. Its operation is demonstrated at telecommunication wavelengths and, in addition, it is fabricated by means of mass production compatible techniques: atomic layer deposition and nanoimprint replication. The possibility to fabricate the proposed structure with such low-cost techniques opens a new path for a variety of nanophotonics applications. more...
- Published
- 2017
- Full Text
- View/download PDF
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