Michael Graetzel is a Professor at EPFL where he develops photosystems for the generation of electricity and chemical fuels from sunlight. Michael graduated from the Technical University Berlin and was a postdoctoral fellow at the University of Notre Dame before joining the EPFL faculty as a professor of physical chemistry. There, he started his ground breaking investigations on colloidal semiconductors, which generated several new research fronts worldwide. Michael is well known for his discovery of mesoscopic dye sensitized solar cells, which in turn prompted the rise of perovskite solar cells, triggering a second revolution in photovoltaics. Michael’s pioneering work was recognized by a number of awards including the Rank Prize, BBVA Foundation Frontiers of Knowledge Award in Basic Science, Millennium Technology Prize, Global Energy Prize, Marcel Benoist Prize, Balzan Prize, Harvey Prize and the King Faisal International Science Prize and rthe Calveras award in photovoltaics. He is an elected member of the Royal Society (UK) and the Chinese and German Academy Science as well as the Swiss Academy of Technical Sciences and the Royal Spanish Academy of Engineering. He is a Honorary member of the Société vaudoise de science naturelle. Michael received 14 honorary doctor degrees from European and Asian Universities. His over 1800 publications had a major impact on the photovoltaic field. A recent bibliometric ranking by Stanford University places Michael first amongst 100.000 world-wide leading scientists across all areas of science. His publications have received so far some 477.500 citations with an h-factor of 299.