高能所科技創(chuàng)新論壇第409期
Title: Phonon transport in thermally insulated solids and the thermoelectric energy conversion
Speaker: Prof. Yue Chen (Department of Mechanical Engineering, The University of Hong Kong)
Host: Prof. Xingzhong Cao
Time: May 29, 2025 (Thursday), 10:00 am Beijing Time
Location: Multidiscipline Building 124
Abstract: Semiconducting solids with strongly suppressed thermal conduction are potential candidates for thermoelectric energy conversion applications. These materials are of great technological interest for recycling waste heat and cooling in unconventional conditions. Strong thermal insulation and careful electrical carrier tuning are required for enhanced energy conversion performance. In conventional solids, lattice thermal conduction is predominant by phonon propagation; however, in materials with ultralow thermal conductivities, diffuson-like thermal transport can play an important role. Based on the results obtained from state-of-the-art theories and advanced experimental characterizations, the thermal transport mechanisms in complex solids and the optimization of electrical carrier properties will be discussed in this presentation. A Zintl compound will be taken as an example to demonstrate how its thermoelectric figure of merit can be improved over a broad temperature range.?
About the speaker: Professor Chen studied at Oxford University and Beihang University, and received his PhD degree in 2010. After completing his postdoctoral training at Columbia University in the City of New York, he joined the University of Hong Kong as an Assistant Professor in 2014, being promoted to Associate Professor in 2020. Prof. Chen’s research focuses on the materials physics for electrical and thermal transport, including electronic structures and lattice dynamics. He has authored more than 200 peer-reviewed journal publications and presented invited papers around the globe. He has received the Outstanding Young Researcher Award and the Best Teacher Award from the University of Hong Kong.
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