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New Generation Silicon Solar Cells

5.4 Laser operations

New Generation Silicon Solar Cells

Front surface contacts:

Burried contacts to minimize the area

obscured by the front contacts

electrodes with a high volume

and collection surface

Depth and width 20μm – 30μm

every 2mm-3mm

Laser Fired Contacts

Electrically and thermo-mechanically

advantageous to include passivation

layer, which is non-conducting

laser creates localized Al/Si- alloys

Efficiency of ~ 21%

Over 1000 rear side local metal point-contacts created per solar cell

Laser generated groves on the cell surface

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