Laser joining of solar cells

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Solar cells are joined together to form solar modules using tiny strips of metal known as stringers. The stringers conduct the electricity produced by the cells. The picture shows a single solar cell with soldered-on stringers. Fraunhofer ILT
Solar cells are joined together to form solar modules using tiny strips of metal known as stringers. The stringers conduct the electricity produced by the cells. The picture shows a single solar cell with soldered-on stringers. © Fraunhofer ILT

A single solar cell produces a relatively low output – it’s a case of strength in numbers. Tiny strips of metal are used to link cells together. If the laser soldering temperature is too high, the solder joint may fracture. A new system provides automatic temperature regulation.


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