Hanwha Q Cells Gmbh

Q-cells Se

Joerg Mueller

Toralf Patzlaff

Robert Wade

Markus Hlusiak

The invention relates to a solar-cell marking method comprising the steps of: providing a substrate with a substrate surface for producing a solar cell () that comprises an active zone (); and producing at least one indentation () in the substrate surface with the use of laser irradiation, wherein the at least one indentation () forms a marking () for marking the solar cell (), and producing the indentation () is carried out prior to carrying out a solar-cell manufacturing process or during carrying out a solar-cell manufacturing process. According to the invention the substrate is designed as a semiconductor wafer with a wafer surface, and the marking () is positioned on the wafer surface such that the marking () is in the active zone () of the solar cell () formed by the semiconductor wafer. Furthermore, the invention relates to a semiconductor-wafer solar cell () whose marking is easily recognizable and thus positioned so as to be reliably readable, without this impeding the functionality of the solar cell ().

Solar-cell marking method and solar cell

The invention relates to a solar cell that comprises a planar semiconductor substrate with a front and a back; a multitude of holes that interconnect the front and the back; and current-collecting electrical contacts that are exclusively arranged on the back. The front comprises highly doped regions and lightly doped regions of a first type such that in each case the holes are situated in a highly doped region or adjoin such a region. According to a first aspect of the invention, the highly doped regions are arranged locally around the holes. According to a second aspect of the invention, the front comprises at least one region without holes, and the highly doped regions comprise one region or several regions that extends/extend to the at least one hole-free region. The invention furthermore relates to methods for manufacturing such solar cells.

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Sandersdorf, Germany

Joerg Mueller