New laser system for the production of large solar cells continuously, quickly and efficiently

Fraunhofer ISE researchers have developed a new system based on laser technology to process large solar cells continuously, quickly and efficiently.

The system, created by German researchers, can produce up to 15,000 large wafers per hour.

The more time passes, the more photovoltaic is important. In some cases, literally. In recent years, increasingly larger silicon wafers have been introduced to the solar market with the aim of increasing module power and improving value for money.

According to PV InfoLink forecasts, in 2023 the G1 format, with a length of 158.75 mm, will be the most used, but the “maxi” variants of 210 mm (G12/M12) will gradually gain ground.

In this optimization process, being able to guarantee high dimensions with constant quality and cycle speed is not acquired. On the contrary, the operation continues to pose a series of challenges to manufacturers.

The Fraunhofer Institute for Solar Energy Systems ISE has developed a new system for the production of large sliceslike M12 and G12.

The device uses ultra-fast laser scanners from MOEWE Optical Solutions and innovative sensor technology to achieve ultra-precise positioning.

The process can produce 15,000 solar wafers per hour.compared to the 7,000 units that are the current standard.

The scientists, led by Dr. Fabian Meyer, also showed that PERC solar cells developed with the demonstration system have the same high efficiency as those currently produced on the market using more traditional methods.

Due to the low running costs of laser treatment, the team also offers significant cost advantages.

The results of the make an important contribution to increasing the productivity and reducing the production costs of solar cells. The system represents a revolutionary development for improving the processes of structuring the photovoltaic production chain.

Dr. Ralf Preu, Head of Photovoltaic Generation Technology at Fraunhofer ISE.

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