主讲人：何然博士

题   目：Half-Heusler thermoelectric materials: Towards the decoupling between electrons and phonons

日   期：2023年11月21日     时   间：14:00-15：00

地   点：哈尔滨工业大学（深圳）, H402室

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ABSTRACT: Among advanced thermoelectric (TE) materials, half-Heusler (HH) compounds offer many advantages, such as their high power factor, mechanical and chemical stability, use of non-toxic and abundant elements, etc. However, these advantages have not been translated into practical applications due to an insufficient reduction in lattice thermal conductivity, making the overall TE performance of HH compounds less competitive than that of other materials (such as Bi2Te3). In this talk, I will present the electronic and phononic transport characteristics of HH compounds and their responses to microstructural modifications. In particular, I will focus on decoupling coupled electron and phonon transport using a variety of strategies, such as phonon group velocity manipulation and grain boundary scattering attenuation. New synthesis approaches will also be discussed to effectively reduce lattice thermal conductivity, such as high-pressure sintering.

报告人简介：何然，2011年获东北大学（中国沈阳）理学学士学位，2016年获休斯顿大学博士学位。曾在德国莱布尼茨固体与材料研究所（IFW-Dresden）从事博士后研究，2020年起担任课题组组长。独立主持德国科学基金会项目1项，并于2023年获得欧盟研究理事会资助（ERC-starting grant）。目前主要研究方向包括固体材料的电声结构、半导体能源材料与器件、热电材料的非平衡合成。