Efthymis Serpetzoglou is a PhD Candidate of “Ultrafast Laser Micro and Nano Processing” Group in “Institute of Electronic Structure & Laser” on “Foundation for Research and Technology – Hellas (FORTH)”. He obtained his 5 years Diploma in Applied Mathematics and Physical Sciences from National Technical University of Athens (NTUA) in 2012 and his M.Sc. in Micro-systems and Nano-devices in Applied Mathematics and Physical Sciences from NTUA (Athens) in 2014. He has experience in Laser Laboratory, as well as fabrication and characterization of Organic Photovoltaics (OPVs) and Biosensors. His current research interests involve Spectroscopy Techniques, such as Transient Absorption, Photo-induced Absorption and Laser Induced Fluorescence, in OPVs and Perovskite Solar Cells (PSCs).