On Friday, 1 February 2019, students from the Centre d'Estudis Roca school, in Barcelona, came to the ICMAB to discover the materials of the future in solar energy! The visit consisted in a first talk from Mariano Campoy-Quiles, researcher at the ICMAB, followed by a visit to four different labs: SEM, XRD, AFM and NANOPTO labs. The visit is in the framework of the ESCOLAB programme of the Ajuntament de Barcelona.