Abbas Ahmad Khan received his PhD Degree in Optical Engineering from the Beijing Institute of Technology, Beijing, China, in 2020. He has worked as a Postdoctoral Researcher at Ajou University, Suwon, South Korea (2021-2022) and as Research Assistant Professor at Hanyang University, Seoul, South Korea (2022-2023). In 2023, he moved to IMDEA Nanociencia, Madrid, Spain, and worked as a Postdoctoral Researcher. His research topics mainly include nanomaterials, the optical and electrical characterization of perovskite materials, quantum dots, graphene synthesis, the fabrication of optoelectronic and photovoltaic devices, and semiconductor device physics.