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Procédés innovants adaptés aux cellules photovoltaïques PERC en couches minces de silicium cristallin

Félix Gérenton 1
1 INL - PV - INL - Photovoltaïque
INL - Institut des Nanotechnologies de Lyon
Abstract : The cost of fabrication of photovoltaic modules is a critical figure for settling solar power into the energy mix. One way to lower this cost is to decrease silicon use in photovoltaic cells. It is technically possible to produce crystalline silicon solar cells only a few dozens of microns thick, although this represents a challenge both for their fabrication process and their optimization. This last one is different from cells of standard thickness, especially by the need of high level light trapping and surface passivation. Two structures will be studied in order to fulfill these aspects : a reflector on the rear side of the cell, and an innovative texturing process used to limit the etching of the already thin silicon absorber. Eventually, the implementation of the rear side reflector into photovoltaic cells will be discussed. The rear side reflector optimized for thin-film crystalline silicon solar cells has shown very good passivating and reflecting properties, as well as compatibility with the overall fabrication process. Moreover, the advanced texturation process developped in this work has shown a large potential gain in photogeneration for thin solar cells. These structures have been characterized and have shown a reflectivity and a passivation level coherent with the state-of-the-art. Finally, solar cells of standard thickness have been fabricated with the thin solar cells process, and have shown an improvement from the rear side reflector in comparison with a standard cell structure. Moreover, making these cells with the thin cells process has shown that the non-standard steps of this process are compatible with high-performance solar cells fabrication.
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  • HAL Id : tel-01698984, version 1

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Félix Gérenton. Procédés innovants adaptés aux cellules photovoltaïques PERC en couches minces de silicium cristallin. Electronique. Université de Lyon, 2016. Français. ⟨NNT : 2016LYSEI143⟩. ⟨tel-01698984⟩

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