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讲准字266号:太阳电池热载流子吸取材料

网络真人百家家乐app:2019-09-29|浏览次数:

讲座报告主题:太阳电池热载流子吸取材料
专家姓名:Gavin Conibeer
日期:2019-10-09 时间:10:00
地点:机械楼7楼报告厅
主办单位:机械工程学院  

主讲概况:Professor Gavin Conibeer received his BSc degree from Queen Mary College, London University in Materials Science; MSc from the University of North London in Polymer Science; and PhD from Southampton University, UK, in III-V semiconductors. Conibeer has held research positions at Monash, Southampton, Cranfield and Oxford Universities and moved to the University of New South Wales, Sydney in 2002. He has published 2 books, 8 book chapters, 200 journal papers and 50 refereed conference papers, with an H-index of 38 and 5000+ citations. He has been successful in securing more than A$12M of research funding. Conibeer is currently Professor and Executive Research Director of the ARC Photovoltaics Centre of Excellence at the University of New South Wales.  Conibeer’s research group consists of 7 PhD students, 2 postdoc fellows and 2 senior research fellows with interests in advanced concepts for photovoltaics, hot carrier solar cells, quantum dot solar cells, photovoltaic applications in space and photoelectrolysis and photocatalysis for solar fuels. 研究专长:第三代光伏、半导体中的热载流子冷却、纳米结构中的声子色散调制、高效热电器件、氢的光电化发电。


主讲内容:热载流子(HC)太阳能电池的目标是在光敏载流子冷却到带边缘发电之前,从光敏载流子中提取能量。HC吸取体最重要的特性是降低载流子的冷却速度。即充分降低了载流子与晶格的热平衡,使总可用能转化为势能成为可能,从而提高了转化效率。光生载流子的能量耗散是一个包含载流子发射热声子的多步过程。中断这些热声子的衰变机制可以降低载流子的冷却速率。体材料如HfN、ZrN和TiH2,在光学声子模和声学声子模之间有很大的带隙,可以阻止这种冷却。多个量子阱也表现出冷却变慢的现象,这可能是由于阱中光学声子的限制。由于声子的反射和约束,钙钛矿材料具有较长的热载流子寿命。对所有这些材料的实验数据进行了回顾和比较,并讨论了在热载流子吸取材料的复合材料结构中结合这两种或两种以上机理的潜力。


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