2025-03-21
11:00 AM - 12:00 PM
MB537
Agenda
Date: 2025-03-21
Time:11-12 pm
Venue: MB537
Speaker: Dr Wen Liu, Department of Electrical & Electronics Engineering, School of Advanced Technology, XJTLU
Topic: Gallium Nitride Power Device Technology for a Green FUTURE
Abstract
Gallium nitride (GaN), a wide bandgap material, has exhibited tremendous potentials because of its high electric field strength and high electron mobility. Nowadays, GaN HEMTs demonstrate superior performance compared to conventional silicon devices, including higher operation temperatures, higher breakdown voltages and faster switching speeds. GaN technology, especially planar GaN HEMTs based on the 2-dimensional electron gas from AlGaN/GaN heterostructure, will allow designers to implement monolithic power systems on a single chip in a more straightforward and cost-effective way.
With monolithic integration of E-mode and D-mode GaN HEMTs together with diodes, resistors and capacitors, the power converter is capable to operate at high voltage and high switching frequency with a reduction of passive components, a decrease in overall system size and an improvement in power efficiency. Furthermore, owing to the material properties, GaN power converter on chip would be able to work at extreme temperatures and environment. GaN Power Device Technology and monolithic integrated GaN power systems will be discussed in detail in this talk
Speaker
WEN LIU, senior associate professor, School of Advanced Technology, Xi’an Jiaotong-Liverpool University, Suzhou, China. Dr. Liu received the B.S. degree from Peking University, Beijing, China, in 2004, and the Ph.D. degree from the Nanyang Technological University, Singapore, in 2008. Currently Dr. Liu is Chair of IEEE CASS-EDS Joint Chapter Suzhou, deputy Director of the Youth Innovation Promotion Committee of the Third Generation Semiconductor Industry Technology Innovation Strategy Alliance (CASA) China, and also Executive Director XJTLU Advanced Semiconductor Research Center, Fellow of The Higher Education Academy of the UK, IEEE Senior Member. To date, Dr. Liu has supervised 9 Ph.Ds. and 20+ Master students to completion. Her current research interests include GaN power devices and their circuit integration. Dr. Liu has published 50+ journal papers, 60+ conference papers, and applied 20+ patents with 13 of them authorized. In the last 5 years, she has been granted various level of funds of more than 8 million RMB including the NSFC General Programme (2023-2027), the National Key R&D Programme from the ministry of Science and Technology (2022-2025), Technical commission project from Huawei Technologies Co. Ltd (2022-2023), etc.
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