This school is focused on the physics of solar cells. It will cover fundamental principles and theoretical limits, the role of interfaces and heterostructures, modeling, photonics, fabrication and characterization techniques, and advanced concepts for high efficiency. It will be shown that the recent progress of the different technologies (Si, CIGS, CdTe, III-V, perovskite,…) are based on similar concepts and should mutually inspire each other. A special emphasis will be given to nanoscience and nanotechnologies, which bring new tools to overcome the limits of conventional solar cells.