CNR-Institute of Materials for Electronics and Magnetism (IMEM), Parma, Italy:- MOVPE growth of epsilon-Ga2O3 - M. Bosi, L. Seravalli- CdTe nanowires - A. Zappettini- X-ray investigation - C. Ferrari University of Parma (UNIPR), Parma, Italy:- Dept of Chemisty, Life Sciences and Enviromental Sustainability X-ray investigation - F. Mezzadri- Dept of Engineering and Architecture Optical investigation - S. Selleri- Dept of Engineering and Architecture Device Simulation - G. Sozzi University of Cagliari (UNICA), Monserrato (CA), Italy:- Dept. of Physics- DFT calculations - V. Fiorentini with P. Alippi- CNR-Institute of Matter Structure, Montelibretti (Roma) ItalyUniversity of Verona (UNIVR), Italy:- CdTe-based flexible solar cells - A. RomeoCNR-Istitute for Microelectronics and Microsystems (IMM), Agrate Unit, Agrate Brianza (MB), Italy:- ToF-SIMS investigation - A. LampertiCNR-Istitute for Microelectronics and Microsystems (IMM), Bologna Unit, Bologna, Italy: - ion implantation in 4H-SiC - R. Nipoti, M. Pieruccini, M.C. CaninoSorbonne Université, Institut des NanoSciences de Paris (INSP), Paris, France: - EPR investigation - J. von BardelebenLeibniz Institute for Crystal Growth (IKZ), Berlin, Germany: - DSC investigation - D. KlimmHungarian Academy of Sciences, Institute for Technical Physics and Materials Science, Budapest, Hungary: - TEM investigation - I. Cora- Rutherford backscattering - Z. ZolnaiUniversity of Valladolid, Spain: Department of Condensed Matter Physics Crystallography and Mineralogy:- CL investigation - J. JimenezFraunhofer Institute for Applied Solid State Physics, Germany: - Conducting and Insulating GaN templates - S. LeoneUniversity of Nova Gorica Vipavska Cesta 11c Ajdovščina, 5270 Slovenia: - XPSElettra Sincrotrone di Trieste, Italy: - X-Ray, AugerPhysical-Technical Institute, Uzbek Academy of Sciences, Tashkent 700084, Uzbekistan:- ZnxSn1-xSe-based solar cellsJRC joint research centre - Commission of the European Communities: - Cell-efficiency measurementsCINVESTAV – Merida – Yucatan Mexico: - New materials for PVZentrum fuer Sonnenenergie- und Wasserstoff-forschung, Baden-Wuertemberg Germany: - Thin film depositionEolite Systems sa, France:- Fiber laserMultitel asbl, Belgium: - Thin film laser scribingSheffield Hallam University, United Kingdom: - CdTe treatmentPaul Drude Institute, Berlin, Germany:- MBE, XPS, AFM, mesa-etching for the isolation of vertical micrometric structures, and realization of interdigitated contacts for UV photodetector devices - O. BierwagenTechnische Universität Berlin, Germany:- Raman spectroscopy, M. WagnerInstitut für Physikalische Chemie RWTH Aachen University, Germany:- Time-of-flight SIMS, ¹⁸0 diffusion experiments - M. Martin, A. FalkensteinItalian Institute of Technology - Center for Nano Science and Technology, Milan, Italy:- Perovskite-based solar cell devices A. Petrozza