Styliani-Aikaterini Polygaraki is a final-year undergraduate student at the National Technical University of Athens (NTUA), studying Applied Mathematics and Physical Sciences with a specialization in Physics, focusing on Optoelectronics, Lasers, and Advanced Materials. She is currently conducting diploma thesis research at NCSR “Demokritos” on perovskite solar cells, with hands-on experience in techniques such as spin coating, spectrophotometry, JV measurements, and ISOS stability testing.