Despite the tremendous interest of the scientific community on photovoltaic solar cells based on hybrid perovskites, many physical phenomena are still not fully understood and subject of controversy, such as the role of electrode/perovskite contact quality. The HYPERSOL project intends to introduce new solutions to improve the interface quality of hybrid perovskites solar cells in order to pin the quasi Fermi levels at Ec and Ev so as to extend the open circuit voltage at the thermodynamic limit for a single junction. Because the Voc in such devices is currently between 1 and 1.1V, we can expect an increase of about 30% in the PCE compared to current devices. To this aim, new dopants and customized self-assembled monolayers will be synthesized and introduced into state-of-the-art devices. Advanced characterization techniques will be used to construct a physical model allowing a complete description of the physics of hybrid perovskites solar cells and their optimization.