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Your search keyword '"Vilcot, A."' showing total 7 results
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7 results on '"Vilcot, A."'

1. Innovative solution to avoid glass substrate bending in a chalcopyrite solar cell fabrication process

Author

Jean-Pierre Vilcot, Boubakeur Ayachi, T. Aviles, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Optoélectronique - IEMN (OPTO - IEMN), and Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)

Subjects
Materials science, Annealing (metallurgy), Scanning electron microscope, chemistry.chemical_element, 02 engineering and technology, 7. Clean energy, 01 natural sciences, [SPI.MAT]Engineering Sciences [physics]/Materials, law.invention, [SPI]Engineering Sciences [physics], law, Sputtering, 0103 physical sciences, Ultimate tensile strength, Materials Chemistry, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Composite material, ComputingMilieux_MISCELLANEOUS, 010302 applied physics, Chalcopyrite, Bilayer, Metals and Alloys, Surfaces and Interfaces, 021001 nanoscience & nanotechnology, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Halogen lamp, chemistry, Molybdenum, visual_art, visual_art.visual_art_medium, 0210 nano-technology
Abstract

Considering the chalcopyrite solar cell fabrication process, the commonly reported substrate bending effect that is observed after thermal process, in a front side halogen lamp-based annealing configuration (Rapid Thermal Annealing –RTA- equipment), has been investigated. We first proposed a simple model explaining the substrate bending shape dependence on the initial stress state within the molybdenum (Mo) layer (free, tensile or compressive). Then, we showed that it is possible to overcome this issue by simply using a reactive (oxygen based) sputtering process for the deposition of the Mo layer. Finally, we showed that using a bilayer structure Mo(O)/Mo allows a more precise control of the flatness of the annealed samples. To understand the mechanisms governing such changes in substrate bending, structural and morphological material changes as a function of oxygen flow have been investigated by using X-ray diffraction and scanning electron microscope imaging, respectively. The elemental distribution throughout the Mo(O)/Mo bilayer structure thickness was also investigated.

Published
2018

7. Investigations on the mechanical properties of the elementary thin films composing a CuIn1 − xGaxSe2 solar cell using the nanoindentation technique.

Author

Abib, Hocine Yacine, Iost, Alain, Montagne, Alex, Rahmoun, Khadidja, Ayachi, Boubakeur, and Vilcot, Jean-Pierre

Subjects
*THIN films, *SOLAR cells, *NANOINDENTATION, *MAGNETRON sputtering, *CADMIUM sulfide, *DOPING agents (Chemistry)
Abstract

In this investigation, the mechanical properties of the different layers composing a CuIn 1 − x Ga x Se 2 (CIGS) based solar cell were studied. Magnetron sputtering technique was used for the deposition of these layers except for the cadmium sulphide (CdS) layer which was deposited using chemical bath deposition process. We performed several indentation tests on the individual layers, i.e. molybdenum (Mo) back contact layer, CIGS absorber layer, CdS and alternative zinc sulphide oxide (ZnOS) buffer layers, and zinc oxide (ZnO)-AZO (aluminium-doped zinc oxide) transparent window layer; all were deposited on glass substrates. We report the values of the hardness ( H ) and of the Young's modulus ( E ) for each material, using indentation tests and an analytical model. The Mo layer remained the hardest and the most rigid, with H = 8.7 GPa and E = 185 GPa, while the CIGS layer has shown poor mechanical properties with H = 3 GPa and E = 58 GPa. On the other hand, the observed similarity in mechanical properties of the ZnO and ZnOS layers might be attributed to the similarity of their microstructures. [ABSTRACT FROM AUTHOR]

Published
2017
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