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Keynote Speakers

Ryan France

(National Renewable Energy Laboratory)

Multijunction Solar Cells for High-temperature Operation in Hybrid CPV-CSP Systems

Monday, April 25, 10:00 - 10:30

Ryan France has been a scientist in the III-V Multijunctions Group at the National Renewable Energy Laboratory (NREL) for 9 years. He received his bachelor’s degree in applied physics from the Washington University in St. Louis, his master’s degree in electrical engineering from Boston University, and his PhD degree in materials science at the Colorado School of Mines. His current research interests are lattice-mismatched solar cells and the development of new absorber materials for multijunction solar cells. He has developed highly efficient mismatched GaInAs solar cells, which have led to inverted metamorphic multijunction devices that achieve over 45% efficiency under concentrated light.

Efficiency and dispatchability of concentrating solar systems can be increased by combining CPV with concentrated solar power (CSP). One approach requires multijunction solar cells that operate at 1000x and 400°C, which requires specific research into high-bandgap materials and device stability.


Andreas Gombert

From 0.001 to 44 MWp with Concentrix Technology

Tuesday, April 26, 10:45 - 11:15

Andreas Gombert studied photo engineering and optics in Cologne, Germany, and Strasbourg, France. He received his PhD from the University Louis Pasteur, Strasbourg. His professional career started in 1986 at the Fraunhofer Institute for Physical Measurement Techniques in the field of integrated optics. From 1991 to 2008, he worked at the Fraunhofer Institute for Solar Energy Systems where he headed the department Materials Research and Applied Optics. From 2008 to 2016 he worked for Soitec Solar GmbH (formerly Concentrix Solar GmbH) as VP System Platform and R&D and managing director. He lectures at the University of Freiburg, Germany, in the technical faculty where he also habilitated.

The Concentrix CPV technology was originally developed by Fraunhofer ISE and industrialized by Soitec. This presentation reviews the most important development steps from the first demonstrator to the largest power plant built with Concentrix technology.


Kenichi Hirotsu

(Sumitomo Electric Industries, Ltd.)

CPV and Smart Grid Systems in Sumitomo Electric

Wednesday, April 27, 10:30 - 11:00

Kenichi Hirotsu received his bachelor's and master's degree in electrical engineering from the Kyoto University in 1982 and 1984 respectively, and his PhD degree from the Georgia Institute of Technology in 1993. He joined Sumitomo Electric Industries, Ltd. in 1984 and engaged in development of Ultra High Voltage power cables, powerline communication, power electronics, CPV and smart grid systems.

Characteristics of Sumitomo's CPV technology and the performance are described, the technical and economical advantages compared to the conventional silicon PV  are evaluated, and the smart grid system with CPV and large scale battery are proposed.


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