Solar Energy Conversion Systems: Time-resolved Spectroscopy
Date: Monday, 18th April 2022
Time: 2:00 PM
Dr. Mohamed Abdellah
Chemistry department, Lund University, Sweden
Energy demands put a strain on the existing energy systems and require an optimized design for new/clean energy infrastructure. The primary concern for most scientists and technologists is the global energy supply and its impacts on our nature, economy, society, and the peace around us. Solar energy is a promising alternative energy source as the overall capacity is 104 more than the current global energy demand if fully utilized. Solar energy can be converted into electricity via solar cells or into chemical energy via artificial photosynthesis systems "solar fuels". Solar energy harvesting is a very complicated process and to achieve high solar-to-energy conversion efficiency a wide range of tools is required to characterize these systems both optically and structurally. In my talk, I will focus on the optical characterization of (1) Light active materials for solar cell application namely, CdSe quantum dots, CdSe/ZnS core/shell quantum dots, and perovskite; (2) Active systems for solar fuels production namely, H2-evolution and CO2 reduction systems. Time-resolved spectroscopy is considered one of the main tools to investigate the charge carrier's dynamics. In my talk, I will cover briefly the concept of transient absorption spectroscopy (TAS) and show how it is used to understand/optimize different solar energy conversion systems.
Bio: Dr. Mohamed Abdellah is a research associate in the Chemistry Department at Lund University, Sweden, and an Associate Professor in the Chemistry Department at the faculty of Science, South Valley University, Egypt. Dr. Abdellah has received his Ph.D. in 2016 from Lund University. Mohamed led several diverse research projects including different materials for solar cell applications and solar fuel production (e.g., Quantum dots, photocatalysts, and Perovskites). He has a highly interdisciplinary background with extensive international experiences throughout his academic career. Over the past 10 years, Mohamed developed extensive knowledge of materials science, a wide range of laser spectroscopy techniques, and synchrotron-based X-ray spectroscopy techniques at different facilities such as MAX Lab (currently, MAX IV) Sweden, Advanced Photon Source (APS) the USA, Deutsches Elektronen-Synchrotron (DESY) Germany, European X-Ray Free-Electron Laser (Eu-XFEL) Germany, the SPring-8 Angstrom Compact free electron Laser (SACLA) Japan, and SOLEIL, France. He has authored 75 publications in high-impact journals including Nature Material, Nature Photonics, JACS, JPCL, Applied Catalysis, small, and Science Advance. Abdellah's work has been cited more than 4100 times and his h-index is 30.
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