高性能柔性熱電材料

報告主題：高性能柔性熱電材料
報告時間：2019年11月22日（周五）下午3時30分 
報告地點：402永利3004

講座簡介：
Thermoelectric materials can directly convert heat into electricity. There is abundant of low-grade heat on earth but most of them are dissipated to ambient environment as waste heat. The conventional thermoelectric materials are inorganic semiconductors and semi-metals. But those inorganic materials have problems of scarce elements, high cost, high toxicity and poor mechanical flexibility. Thus, thermoelectric polymers have been gaining more and more attention because they consists of common elements like C, O, S and H and have merits of low density, low cost, low thermal conductivity and high mechanical flexibility. In particular, poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is very promising as the next-generation thermoelectric material because of its addition merit of solution processability. PEDOT:PSS can be dispersed in water and some polar organic solvents, and high-quality PEDOT:PSS films can be readily prepared by solution processing techniques like coating and printing. The main problem for thermoelectric polymers is their low power factor. It is important to develop novel methods to enhance the thermoelectric properties. Here, I will present a couple of methods to significantly enhance the conductivity and the Seebeck coefficient thus the power factor of PEDOT:PSS. The power factor can be >700 W/(m K2), and the ZT value can be as 0.75. In addition, I will present some of our recent works on developing quasi-solid state ionogels with high thermoelectric properties.

講座人介紹：
 
歐陽建勇 教授，于清華大學化學系、中國科學院化學所和日本分子科學研究所獲得學士、碩士和博士學位。然後在日本北陸先端科學技術大學院大學作助理教授和美國加州大學洛杉矶分校作博士後。2006年加入新加坡國立大學材料與科學工程學院，研究方向為有機電子、存儲器件、納米材料等方面的研究，在Nature Materials、Nature Nanotechnology、Nature Communications、Advanced Materials、Nano Letters等學術刊物上發表論文180餘篇。多篇研究成果被MIT Technology Reviews、world journal、azonano.com、Nanotechweb、Journal of Materials Chemistry等報道或評為年度亮點文章。他的主要研究成果包括發明了世界上第一個高分子/納米顆粒存儲器和多次刷新可加工導電高分子電導和熱電性能的世界記錄。獲得IUPAC的Distinguished Award for Novel Materials and Their Synthesis,  NUS Young Investigator Award, 北京科學技術獎一等獎, 日中科學技術交流協會天田科學技術獎勵獎 和中國科學院院長獎學金特别獎（獲得此獎的唯一碩士研究生，其餘獲獎者都是博士研究生）. 平均單篇論文引用>80次。