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Fraunhofer-Institut für Solare Energiesysteme ISE
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Press and Media

On this page we inform you regularly about our press activities.

Agrophotovoltaics (APV) pilot plant located in Heggelbach

Current Press Releases
Fraunhofer ISE Develops Highly Compact, High Frequency DC/DC Converter for Aviation – Gallium Nitride Transistors Enable Switching Frequencies in MHz Range
Oct 17, 2016

The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs. Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power electronic systems in aviation applications more efficient.

Global Energy Transformation as Vocation – Symposium for Institute Director Eicke R. Weber on Occasion of Retirement
Nov 11, 2016

On November 11, 2016 at the Konzerthaus in Freiburg, the Fraunhofer Institute for Solar Energy Systems ISE honored Prof. Eicke R. Weber’s achievements at a scientific symposium on the global energy transformation. Having reached retirement age, Prof. Weber will step down from his position as Institute Director at the end of the year. Weber gave the German solar research a voice that is observed worldwide. With great enthusiasm he supported the energy transformation on both the scientific and political arenas. At the Institute, he organized the structure and business areas to optimally meet the demands of the energy transformation. From 2006 to 2016, he was able to double the number of employees to 1100 today. Over the same time period, the operating budget, based primarily on self-acquired projects, grew from ca. 25 million euros up to 73 million euros (2015).

30.2 Percent Efficiency – New Record for Silicon-based Multi-junction Solar Cell
Nov 09, 2016

Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with the Austrian company EV Group (EVG) have successfully manufactured a silicon-based multi-junction solar cell with two contacts and an efficiency exceeding the theoretical limit of silicon solar cells. For this achievement, the researchers used a “direct wafer bonding” process to transfer a few micrometers of III-V semiconductor material to silicon, a well-known process in the microelectronics industry. After plasma activation, the subcell surfaces are bonded together in vacuum by applying pressure. The atoms on the surface of the III-V subcell form bonds with the silicon atoms, creating a monolithic device. The efficiency achieved by the researchers presents a firsttime result for this type of fully integrated silicon-based multi-junction solar cell. The complexity of its inner structure is not evident from its outer appearance: the cell has a simple front and rear contact just as a conventional silicon solar cell and therefore can be integrated into photovoltaic modules in the same manner.

07-portrait-Karin Schneider
Karin Schneider, M.A.
Head of Press and Public Relations
Fraunhofer ISE