Event
69ÈÈÊÓƵ Seminar: Prof. Ifor Samuel- Organic Semiconductor Optoelectronics: Communications, Medicine and Lasers
Friday, August 2, 2024 14:00to15:00
Maass Chemistry Building
Ruttan Room, 801 rue Sherbrooke Ouest, Montreal, QC, H3A 0B8, CA
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Organic semiconductors are remarkable carbon-based materials that combine novel semiconducting optoelectronic properties with simple processing. They can be used to make printed and flexible electronics, and their properties (e.g. colour) can be tuned by changing their chemical structure. Organic light-emitting diodes (OLEDs) are compact visible light sources that are now found across the world in mobile phone displays and televisions. This talk will give an introduction to organic semiconductors and optoelectronic devices made from them.
It will then explore two emerging fields of application. The first is photodynamic therapy (PDT). In PDT light in combination with a light-activated chemical leads to the generation of reactive oxygen species. OLEDs are very attractive light sources for PDT because they emit over an area, are thin and potentially flexible We have shown that PDT with OLEDs can kill skin cancer, parasites and bacteria. Another emerging application is in visible light communication (or Li-Fi) in which light is modulated to encode information to supplement Wi-Fi. Finally a new organic optoelectronic device – a laser electrically driven by an OLED will be presented.
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Bio:
Ifor Samuel is Professor of Physics at the University of St Andrews. He received his MA and PhD from the University of Cambridge, working on optical spectroscopy of organic semiconductors. He was a Research Fellow at Christ’s College, Cambridge and also performed postdoctoral work at CNET-France Telecom in Paris, before setting up his own research group on light-emitting polymers at the University of Durham. In 2000 he moved to the University of St Andrews where he founded and leads the Organic Semiconductor Centre. His current work concerns the photophysics of organic semiconductor materials and devices including organic light-emitting diodes, solar cells, lasers and their applications, and he has published over 500 journal papers. He is a Fellow of the Royal Society of Edinburgh, the Institute of Physics, SPIE and the Royal Society of Chemistry.