报告题目：分子光伏薄膜中电荷产生的控制因素(Factors controlling charge pair generation in molecular films for photovoltaic energy conversion)
报 告 人：Jenny Nelson 教授(英国帝国理工学院物理系,英国皇家学会院士)
报告时间：2025年7月5日（星期六）上午10:00
报告地点：五山校区逸夫人文馆报告厅
邀 请 人：吴宏滨教授
主办单位：物理与光电学院,发光材料与器件全国重点实验室
报告摘要：
Through a remarkable series of advances in materials design, the efficiency of photovoltaic energy conversion in molecular materials has risen from 1% to over 20% within two decades, surpassing most predictions. There is some evidence that the best performing molecular materials are able to support charge pair generation in single material domains, and that this may assist current generation at a heterojunction. In this work we address this question by combining experimental measurements of charge generation in single-component and heterojunction devices with a computational model of the generation and evolution of delocalised excited states in such systems. Using the model we identify key molecular parameters that are likely to assist charge generation and consider the extent to which these parameters are optimised in the best performing materials. We consider the influence of factors such as the nature of the charge separating heterojunction, molecular packing, energy and charge transport, electron-phonon coupling and loss pathways. We find that low exciton reorganization energy and high and isotropic electronic coupling are important for efficient photogeneration. In a separate study we show how some of the key molecular parameters can be determined from measurements of luminescence from the materials. Finally, we will address the limits to energy conversion efficiency in such systems.
报告人简介：
Jenny Nelson 教授是英国帝国理工学院物理系教授，英国皇家学会院士。其文章已被引用 55000 余次，H-index 101(WoS)。Nelson 教授于 1983 年在剑桥大学获得学士学位，随后于 1988 年在布里斯托大学获得博士学位，随后一直研究各种新颖材料在太阳能电池中的应用，目前主要致力于有机分子半导体材料的研究。Nelson 教授在光伏器件理论、仿真和实验方面做出了突出的贡献，推动了有机半导体、多晶氧化物、共轭分子以及有机-无机杂化太阳电池等材料的设计和进步，并且通过电学、光物理学以及结构学的研究，将理论物理模型用于分析材料和器件的性能，从而指导材料和器件的设计和优化，推动了相关产业的发展。2023年2月起，Jenny Nelson 教授出任英国皇家化学会出版的能源与环境领域期刊 Energy & Environmental Science期刊主席。
Nelson 教授课题组目前主要研究领域包括：
有机分子电子材料的多尺度模型研究
有机/杂化太阳能电池的器件物理研究
有机分子电子材料的电学、光谱学以及结构分析研究
太阳能电池作为可再生能源的潜力研究
Biography Jenny Nelson
Jenny Nelson is a Royal Society Research Professor at Imperial College London, where she researches novel materials for solar energy conversion. Her current research is focussed on understanding structure-property relationships in molecular and hybrid semiconductor materials and how these relationships influence the mechanisms of solar energy conversion. She also works on the role of renewable energy technologies in mitigating climate change. She is an ISI Highly Cited Researcher and has published over 450 articles in peer reviewed journals, several book chapters and a book on The Physics of Solar Cells. She holds several awards including the 2016 Institute of Physics Faraday medal and the 2023 IEEE PVSC Cherry Award and was elected as a Fellow of the Royal Society in 2014.
