Frank Siebke

Attolight AG manufactures edge cathodoluminescence instruments to measure carrier dynamics in nanostructures. It also distributes electron microscopes. The company was founded by Samuel Sonderegger and Jean Berney in 2008 and is headquartered in Ecublens, Switzerland.

Good Energies AG (Good Energies) is the private equity subsidiary of COFRA Holding AG founded in 2001 by Marcel Brenninkmeijer. The firm is headquartered in Switzerland.

NexWafe GmbH supplies high quality wafers to solar cell producers. The company was founded by Stefan Reber, Frank Siebke, Roy Segev and Kai Schillinger on May 18, 2015 and is headquartered in Freiburg im Breisgau. Germany.

Sunfilm AG is one of the world's largest manufacturers of silicon-based thin-film modules with a combined capacity of 85 megawatts peak (MWp) at its two German production sites in Grossroehrsdorf and Bitterfeld-Wolfen. The company has an additional 60 MWp of capacity under construction as well. Thin-film is one of the fastest growing segments of the solar PV industry. Sunfilm's innovative technology for tandem junction thin-film silicon solar modules allows a larger part of the solar spectrum to be harvested as compared to amorphous silicon thin-film solar modules, leading to higher module efficiencies. Additionally, the amount of silicon needed to produce these modules is significantly less than for crystalline silicon modules.