Keynote Speakers

Dr. Johannes Greulich, Fraunhofer Institute for Solar Energy Systems


Monday, March 28 8:45-9:15 CEST


Contactless Measurement of Current-Voltage Characteristics for Silicon Solar Cells



Johannes Greulich received the Diploma degree in physics from the University of Freiburg, Germany, in 2010. He received a Ph.D. Fellowship from the German Federal Environmental Foundation (Deutsche Bundesstiftung Umwelt) and the Ph.D. degree in physics in 2014 from the University of Freiburg, Germany for his work on electrical and optical simulation and characterization of crystalline silicon solar cells. Since 2015, he is Head of the Group for Inline Solar Cell Analytics and Simulation at the Fraunhofer Institute for Solar Energy Systems. His research interests include the development of optical and electrical simulation and characterization methods focusing on crystalline silicon solar cells.



We propose a methodology to determine the current-voltage characteristics of silicon solar cells in a contactless way. We summarize the theory, describe the experimental setup and compare contactless with conventionally measured results. 

Prof. Stefaan de Wolf, KAUST


Tuesday, March 29 10:30-11:00 CEST


Monolithic Perovskite/Silicon Tandem Solar Cells: Towards High Outdoor Performance and Reliability



Stefaan De Wolf received his Ph.D. degree in 2005 from the Katholieke Universiteit Leuven in Belgium, during which time he was also affiliated with IMEC. From 2005 to 2008, he was a researcher at the National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan. In 2008, he joined Ecole Polytechnique Federale de Lausanne (EPFL), Switzerland, as a team leader working on high-efficiency solar cells. Since September 2016 he has been an associate professor at KAUST in Saudi Arabia, focusing on high-efficiency silicon and perovskite solar cells and their combinations in perovskite/silicon tandem solar cells.



In this presentation, I will discuss several methods to build efficient monolithic perovskite/silicon tandem solar cells from textured silicon wafers. I will also focus attention to reliability aspects for successful long-term outdoor performance.