Mechanism Model and Characteristic Control of Thin Film Field Effect Transistors
Date: 2023/10/24 - 2023/10/24
Academic Seminar: Mechanism Model and Characteristic Control of Thin Film Field Effect Transistors
Speaker: Chuan Liu, Full Professor, Sun Yat-sen University (China)
Time: 10:00 am, October 24, 2023 (Beijing Time)
Location: Room 414B, JI Long Bin Building
Abstract
The emergence of new materials has brought new important issues to the fundamental theory and device mechanisms of thin film field effect transistors. Revealing the intrinsic electrical characteristics of new materials is very important for both basic research and application research of new materials and new devices. Many newly developed nanowires, two-dimensional nanosheets, organic small molecules or polymers have been used to fabricate field effect transistors (FETs) or thin film transistors (TFTs). However, due to mismatches in electrode work functions, interface defect states, thermal damage, anisotropic transport, interface trapping, etc., many devices deviate from the characteristics of ideal transistors, which presents great difficulties in deeply studying the transport properties of these semiconductors and the working states of the devices. The advantages of organic semiconductors and oxide semiconductors are very obvious, which can prepare thin film devices through lower temperatures or even solution processes, and have bendability. But the two have a common drawback, that is, the disorderliness of crystal structure leads to a large number of defect states. This leads to significant differences in the mechanisms of charge injection and charge transport in field effect phenomena compared to covalent bonded silicon-based transistor devices. This report will explore new ideas on thin film field effect transistor theory models and characteristic control from both theoretical and experimental perspectives.
Biography
Chuan Liu received Ph.D. degree from University of Cambridge (U.K.) where he studied organic electronics. Then he moved to National Institute for Materials Science (NIMS, Japan) as a postdoc researcher and to Dongguk University (Seoul, South Korea) as an assistant professor. He has been a full professor in Sun Yat-sen University (China) since 2014. He is mainly interested in theoretical and experimental studies in oxide and organic semiconductors, interfacial engineering for thin-film devices, and printed electronics. He has received Korean Information Display Society Gold Award and Best Career Award from Semiconductor Science and Technology of IOP Publishing for the research in semiconductors for transistors. He has served in the editorial board of the journal Semiconductor Science and Technology and as an associate editor of Journal of the Society for Information Display since 2017.