【15th.Oct.】Guided Discovery of New Semiconducting Materials for Efficient Solar Energy Conversion
日期：2015-10-15
閱讀：884
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TOPIC: Guided Discovery of New Semiconducting Materials for Efficient Solar Energy Conversion
SPEAKER: 米啟兮 博士，上?？萍即髮W(xué)物質(zhì)學(xué)院 助理教授
TIME:OCTOBER 15 (Thursday) AM10:00
LOCATION: 410 Meeting Room, Chemistry Building B (化學(xué)B樓410會議室)
INVITER: Prof. Jiesheng Chen (陳接勝教授)
Abstract: Scalable applications of solar energy conversion to electricity and chemical fuels require semiconductors that feature efficient light absorption and ambient stability. In order to find new semiconducting materials that significantly outperform existing ones, we derive a hypothesis that explicitly relates the type of band gap (i.e., a direct or indirect band gap) and the crystal structure of a given semiconductor: For a compound semiconductor composed of d0, d10, and s2 metal cations and chalcogenide or halide anions, the type of its band gap is directly correlated to the structural topology of the metal polyhedra in the crystal structure. Recently, under the guidance of this structure–property relationship for compound semiconductors, we have experimentally discovered several new perovskite-type materials that exhibit high structural symmetries, sharp absorption edges, as well as enhanced stabilities. Plans for applying these new semiconductors in solar cells and solar water splitting will also be discussed.
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個人簡介：米啟兮從北京大學(xué)化學(xué)學(xué)院獲得理學(xué)學(xué)士學(xué)位(2003年)，并畢業(yè)于美國西北大學(xué)化學(xué)系，獲得哲學(xué)博士學(xué)位(2009年)。此后他利用美國自然科學(xué)基金會獎學(xué)金，在加州理工學(xué)院太陽能化學(xué)創(chuàng)新中心(CCI Solar)進行了博士后研究，并與美國能源部下屬的阿貢-西北太陽能研究中心(ANSER)和人工光合作用聯(lián)合中心(JCAP)開展了緊密合作。作為上?？萍即髮W(xué)物質(zhì)學(xué)院的全職助理教授，米啟兮的研究方向是材料物理化學(xué)和清潔能源，主要的研究內(nèi)容包括：人工光合作用、太陽能分解水制氫氧、光電化學(xué)、半導(dǎo)體光電轉(zhuǎn)化材料、光致電子轉(zhuǎn)移和時間分辨光譜/磁共振譜學(xué)。
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