| Topic: | Thermal Transport in Wide-bandgap Materials and Devices |
| Speaker: | Prof Satish Kumar George W. Woodruff School of Mechanical Engineering Georgia Institute of Technology, US |
| Date: | Friday, 15 July 2022 |
| Time: | 3.00pm to 4.00pm |
| Venue: | Seminar Room EA-06-03Â (Block EA, Level 6)
(Map of NUS can be found at here) |
| Host: | A/Prof Koh Yee Kan |
Applications such as power electronics or faster wireless networks require devices with superior power density and power switching capabilities. Gallium Oxide, Ga2O3, an ultra-wide-bandgap semiconductor, is expected to show superior properties when used for power switching devices. This talk will discuss how comparison of experimental measurements against the numerical predictions can be used to decipher the effects of the different types of defects on the thermal conductivity of epitaxially grown Ga2O3. Time-domain thermo-reflectance has been used to perform the experiments, and density functional theory and the Boltzmann transport equation for thermal conductivity calculations. Investigation of phonon transport in β-Ga2O3 field-effect-transistors using non-gray Boltzmann transport equations will be discussed. Finally, a machine learning framework to predict the thermal properties of electronic materials from first principles will be discussed.
Dr Satish Kumar is currently Professor in George W. Woodruff School of Mechanical Engineering at Georgia Tech. Prior to joining Georgia Tech in 2009 as an Assistant Professor, he worked at IBM Corporation where he was responsible for the thermal management of electronic devices. Kumar received his Ph.D. in Mechanical Engineering and M.S. degree in Electrical and Computer Engineering from Purdue University, West Lafayette in 2007; and B.Tech. degree in Mechanical Engineering from the Indian Institute of Technology, Guwahati in 2001. His research interests are in electro-thermal transport study in electronic devices and materials, e.g., wide-bandgap devices, electric motors, etc. He is author or co-author of over 150 journal or conference publications. Dr. Kumar is an ASME Fellow and recipient of 2005 Purdue Research Foundation Fellowship, 2012 Summer Faculty Fellow from Air Force Research Lab, 2014 Sigma Xi Young Faculty Award, 2014 DARPA Young Faculty Award, 2017 Woodruff Faculty Fellow, and 2020 ASME K-16 Clock Award.