Hybrid Organometal Trihalide Perovskite Solar Cells
Event details
| Date | 23.10.2013 |
| Hour | 16:45 › 18:45 |
| Speaker |
Dr. Henry J. Snaith, Oxford University Bio: Dr. Snaith undertook his PhD at the University of Cambridge under the supervision of Professor Sir Richard Friend, working on polymer blend photovoltaic diodes. Highlights of this work include greatly enhancing the understanding of charge generation and collection from such devices, and developing routes to maximize the voltage generated. Following his PhD Dr. Snaith spent two years at the École Polytechnique Fédérale de Lausanne (EPFL) as a post doc working under Prof. Michael Grätzel. His research at EPFL focused on developing the technology behind and understanding the operation of solid-state DSCs. He returned to the Cavendish Laboratory in Cambridge to take up a Junior Research Fellowship for Clare College in 2006, where he continued to independently develop and study the solid-state DSC, pushing the solar power conversion efficiency to over 5%. In October 2007 he was appointed as an RCUK fellow/lecturer in photovoltaics at the University of Oxford, where he now leads a research group of 15 scientists primarily focused on advancing the fundamental understanding and operation of solid-state DSCs and hybrid solar cells. His current research is heavily focused on developing new material nanostructures for dye-sensitized and hybrid solar cells and understanding and controlling the physical processes occurring at electronic interfaces. |
| Location | |
| Category | Conferences - Seminars |
Combining both ultimately low cost materials and production with a high efficiency solar technology has thus far been elusive. Low cost materials, such as organics and oxides, tend to suffer from fundamental energy losses required to separate excitons and collect free charge carriers in electronically disordered semiconductors. This energy loss, can be defined by the difference between the optical band gap and the open-circuit voltage, and is typically 0.65 to 0.8 eV for organics, dye-sensitized and a-Si, but for a “perfect” single junction solar cell the theoretical minimum losses, as determined by the Shockley–Queisser limit are in the region of 0.3 to 0.25 eV, which is achieved for the highest efficiency PV technology, GaAs. Recently we have reported a new type of solution processed thin-film solar cell based on a metal-organic perovskite absorber which overcomes most of these fundamental losses, and delivers both high efficiency and promise for ultimate low cost. Here I will present recent advances with perovskite based solar cells, both in understanding of perovskite crystallization and film formation, fundamental photo physical operation, and in understanding and enhancing solar cell performance.
Practical information
- Informed public
- Free
- This event is internal
Organizer
- Dr. Joël Teuscher, Laboratory of Photonics and Interfaces
Contact
- Dr. Joël Teuscher, Laboratory of Photonics and Interfaces