Method of manufacturing a photovoltaic foil

H - Electricity – 01 – L

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H01L 31/18 (2006.01) H01L 27/142 (2006.01) H01L 31/032 (2006.01) H01L 31/0392 (2006.01)

Patent

CA 2405177

The invention pertains to a method of manufacturing a photovoltaic foil comprising a TCO layer, a photovoltaic layer, and a back electrode, which method comprises the following steps: providing a conductive temporary substrate; applying a TCO layer on the temporary substrate; applying a photovoltaic layer on the TCO by means of electrodeposition, with the current during the electrodeposition being supplied at least through the temporary substrate; applying a back electrode; if so desired, applying a permanent substrate; removing the temporary substrate. The crux of the invention is that the unit of the conductive temporary substrate and the TCO functions as electrode during the electrodeposition of the photovoltaic layer. Because of this, the rate of deposition of the photovoltaic layer can be increased compared with that of the prior art. Furthermore, a photovoltaic layer with a more homogenous layer thickness is obtained.

L'invention concerne un procédé de fabrication d'une feuille photovoltaïque comprenant une couche d'oxyde transparent conducteur (TCO), une couche photovoltaïque et une électrode arrière, lequel procédé comprend les étapes consistant à : fournir un substrat temporaire conducteur; appliquer une couche TCO sur le substrat temporaire; appliquer une couche photovoltaïque sur le TCO par électrodéposition, le courant étant délivré pendant l'électrodéposition au moins à travers le substrat temporaire; appliquer une électrode arrière; si nécessaire, appliquer un substrat permanent; retirer le substrat temporaire. Le coeur de l'invention est le fait que l'unité formée du substrat temporaire conducteur et du TCO fonctionne en tant qu'électrode pendant l'électrodéposition de la couche photovoltaïque. Ainsi, la vitesse de déposition de la couche photovoltaïque peut être augmentée en comparaison de celle obtenue avec les procédés antérieurs. De plus, une couche photovoltaïque présentant une épaisseur de couche plus homogène est obtenue.

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