Featured in Cracking the code – 03-2011

Expanding the laser tool box

Lasers in PV production: Lasers have the potential to become vital tools for many processes in the production chain of crystalline solar cells. Malte Schulz-Ruhtenberg of the Fraunhofer Institute for Laser Technology ILT in Aachen, Germany, reports on research projects his institute is involved in and their results.

Lasers as manufacturing tools offer several advantages, ones especially relevant for the production of solar cells. The contactless and localized nature of the energy deposition allows for new processes, such as laser selective emitter doping, laser ablation of dielectric coatings and via drilling for back contact cell concepts. A critical factor is the correct selection …

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