Metalorganic lead halide perovskites have emerged recently as a very promising class of materials for photovoltaics. Perovskite solar cells combine high efficiency (>20%) with ultra-low cost fabrication via low temperature solution processes and have a high potential for use e.g. in building integrated photovoltaics. Yet, the main drawbacks to be overcome for making out of the scientific breakthrough a real technology are (a) the presence of lead, (b) the limited understanding of detrimental processes (e.g. device hysteresis) and (c) the limited stability. SuperSansPlomb addresses the following key issues: i) Coherent design of lead-free perovskites using combined theoretical and experimental screening; ii) Device integration and study of the fundamental processes governing the charge generation and transfer in the lead-free perovskite solar cells; iii) Development of selective contacts and blocking layers yielding optimized solar cell performance and long term stability.