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Solar cells: Optimised growth and sawing of crystals

13.02.2017

The market for photovoltaic systems is highly competitive. In order to achieve higher efficiency and reduce costs, manufacturers are continuously optimising the production processes. The new BINE-Projektinfo brochure "Cheaper production of solar cells" (02/2017) presents two improved prduction processes.

The first makes it possible to produce quasi-monocrystalline silicon with a significantly lower energy requirement and at the same time obtain a very pure, high-quality silicon. The second reduces the material losses when the silicon ingots are sawn into many thin slices (wafers). The new sawing technology will enable more wafers to be obtained from the same amount of silicon.


The produced wafers are ready for the next steps on the path to the module.

© SolarWorld GmbH

Silicon wafers will soon be as thin as paper

Researchers have developed a new crucible-free crystal growing process for quasi-monocrystalline silicon. Cells from this material reach an efficiency of 21%, which is comparable to standard monocrystalline cells but with lower production costs.

On the way from silicon to solar modules, the silicon ingots are sawn into thin wafers. Here a new type of diamond wire with a specially adapted cooling liquid has proved its worth. This makes it possible to saw the wafers faster and with significantly lower material losses. In addition, this system can be used to reduce the wafer thickness from the current 180 μm to 100 μm in future.

The widespread silicon photovoltaics sector will enable the optimised production processes for crystallisation and wafering to be easily integrated into existing production lines. SolarWorld Innovations GmbH (SWIN) carried out the project together with partners from the scientific community.

You found all informations about the BINE Projektinfo brochure entitled "Cheaper production of solar cells" here:

http://www.bine.info/en/press/press-releases/press/pressemitteilung/solarzellen-...

Uwe Milles/Birgit Schneider
presse(at)bine.info

About BINE Information Service

Energy research for practical applications

The BINE Information Service reports on energy research topics, such as new materials, systems and components, as well as innovative concepts and methods. The knowledge gained is incorporated into the implementation of new technologies in practice, because first-rate information provides a basis for pioneering decisions, whether in the planning of energy-optimised buildings, increasing the efficiency of industrial processes, or integrating renewable energy sources into existing systems.

About FIZ Karlsruhe

FIZ Karlsruhe – Leibniz Institute for Information Infrastructure is a not-for-profit organization with the public mission to make sci-tech information from all over the world publicly available and to provide related services in order to support the national and international transfer of knowledge and the promotion of innovation.
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FIZ Karlsruhe is a member of the Leibniz Association (WGL) which consists of 87 German research and infrastructure institutions.

Weitere Informationen:

http://www.bine.info/en - BINE Informationsdienst

Rüdiger Mack | idw - Informationsdienst Wissenschaft

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