主講人： 裴豔中博士

講座時間：2012.06.07 上午9:30

講座地點：材料學院441會議室

講座題目：Electron and Phonon Engineering in thermoelectric s

裴豔中，2008年畢業于中科院上海矽酸鹽研究所獲博士學位，後赴美訪學現就職于加州理工學院。其主要的工作集中在熱電能源轉化材料與技術的研究，屬材料科學及半導體物理領域。裴博士迄今已發表科技論文30餘篇，其中以第一或通信作者在Nature，PNAS，Energy Environ Sci，Adv Mater、Adv Func Mater，Adv Energy Mater上共發表論文10餘篇。相關工作被選為Energy Environ Sci 封面故事并收到來自Science和其他雜志的專題點評。申請或授權中美專利約10項，并作為國内首位世界第五位被授予本領域内為博士研究生設立的最高年度獎項——2007 Goldsmid Award。其科研成果已對本領域産生重大影響并得到廣泛認可。

講座主要内容：Thermoelectric generators which directly convert heat into electricity have long been relegated to use in space or other niche applications, but are now actively considered for a variety of waste heat recovery systems (such as the conversion of automobile exhaust heat into electricity) to combat the global energy dilemma. Although the devices are supremely reliable and compact, the thermoelectric materials themselves are relatively inefficient requiring advancing the thermoelectric figure of merit, zT above 1.5 for widespread application.

In this talk, several strategies to achieve high zT, regarding band structure and phonon engineering, are proposed and demonstrated experimentally. The achieved extraordinary high peak zT of 1.8 and high average zT support the possibility of further development of existing materials. With any luck, the improvements resulting from these approaches will be large enough to promote thermoelectric devices from niche applications into the mainstream technology market.

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材料科學與工程學學院

2012.05.28