Featured in The great integrator – 08-2022

Open opportunity for laser processing

Laser contact opening (LCO), a standard process in PERC cell production, has seen little market development in the past few years. Stiff competition from equipment suppliers in Asia, combined with the fact that most new n-type manufacturing doesn’t make use of LCO, has kept the level of interest here quite low. However, as the PV research community increases its focus on reducing silver consumption, new approaches to cell contacting and metallization provide impetus for a second look at laser processing.
Image: Fraunhofer ISE

In PERC (passivated emitter rear cell) solar manufacturing, a passivation layer is applied to the rear side of the cell to improve stability. Then small “pockets” need to be opened up in this layer to allow more light to reach the active cell surface, and increase its conversion efficiency.As PERC manufacturing grew, lasers fast became …

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