From September 20 to 23, 2026, the 18th China Conference on Thermoelectric Materials and Applications was held in Harbin. The conference aimed to gather researchers engaged in thermoelectric conversion materials and device applications nationwide to exchange the latest research findings and discuss international research frontiers and hotspots in the field. Group members Li Changyuan and Cheng Yueyue attended the conference and gave oral presentations respectively.

Changyuan Li gave a presentation titled “Local Atomic Structure and Low Lattice Thermal Conductivity of I-V-VI Group Thermoelectric Materials”. This work focused on I-V-VI group semiconductor thermoelectric materials. By regulating the local atomic structure through alloying strategies and in-situ phase transitions, and analyzing it using the atomic pair distribution function (PDF), the study elucidated the structure-property relationship at the sub-nanometer scale, providing a theoretical basis for optimizing the lattice thermal conductivity of thermoelectric materials.

Yueyue Cheng gave a presentation titled “Prediction of Mechanical and Acoustic Properties of Thermoelectric Materials Based on Total Scattering PDF”. Based on powder X-ray and neutron total scattering data, this work constructed a local interaction model to extract effective local force constants and anharmonicity information, providing a new experimental approach for long-wavelength lattice dynamics research that does not rely on high-quality single crystals.

During the conference, besides presenting their own research results, they also attentively listened to several cutting-edge academic presentations and engaged in in-depth exchanges with fellow scholars regarding the latest developments in thermoelectric materials. This participation not only showcased the research progress of the group in related fields but also broadened the students’ academic horizons through the collision of ideas, drawing new research inspirations for the follow-up research.

第十八次中国热电材料及应用学术会议

2026年9月20日至23日，第十八次中国热电材料及应用学术会议在哈尔滨召开。会议旨在汇聚全国从事热电转换材料及器件应用的科研工作者，交流最新科研成果，探讨本领域国际研究前沿与热点。课题组成员李昌源、程悦悦参加了此次会议，并分别作口头报告。

李昌源作题为《I-V-VI族热电材料的局域原子结构及其低晶格热导率》的报告。该工作以I-V-VI族半导体热电材料为研究对象，通过合金化策略与原位相变调控局域原子结构，并用原子对分布函数（PDF）分析阐明了亚纳米尺度下的构效关系，为热电材料的晶格热导率性能优化提供了理论依据。

程悦悦作题为《基于全散射PDF的热电材料力学与声学性质预测》的报告。该工作基于粉末X射线和中子全散射数据构建原子间相互作用模型，提取有效局域力常数和非谐性信息，为不依赖高质量单晶的长波近似下晶格动力学研究提供了粉末样品实验新途径。

参会期间，两位同学在展示自身研究成果的同时，也认真听取了多场前沿学术报告，并与同行学者围绕热电材料的最新动态展开了深入交流。此次参会不仅展现了课题组在相关领域的研究进展，也让同学们在思维碰撞中开阔了学术视野，为后续课题的开展汲取了新的研究思路。