Front-and-back contact solar cells, and method for the production thereof
AssigneeFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
InventorsFilip Granek, Daniel Kray, Kuno Mayer, Monica Aleman, Sybille Maria Hopman
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for the production of solar cells which are contacted on both sides, which method is based on micro structuring of a wafer provided with a dielectric layer and doping of the microstructured regions. Subsequently, deposition of a metal-containing nucleation layer and also a galvanic reinforcement of the contactings is effected. The invention relates likewise to solar cells which can be produced in this way.
Claims18
A method for the production of solar cells which are contacted on both sides, in which
- a) a wafer is coated on the front- and the rear-side at least in regions with at least one dielectric layer,
- b) microstructuring of the at least one dielectric layer is effected,
- c) doping of the microstructured surface regions is effected, by at least one liquid jet which is directed towards the surface of the solid body and comprises at least one doping agent being guided over regions of the surface to be doped, the surface being heated locally in advance or simultaneously by a laser beam,
- d) a metal-containing nucleation layer is deposited at least in regions on the rear-side of the wafer and
- e) a galvanic deposition, at least in regions, of a metallisation is effected on the front- and the rear-side of the wafer for contacting thereof on both sides.
Dependencies are inferred from the claim text.