报告人：韩礼元（中组部国家千人，上海交通大学特聘教授）
报告题目：Towards commercialization of perovskite solar cells
报告时间：2017年11月3日上午9:30
报告地点：能源与材料创新研究院一楼报告厅115
报告人简介：
韩礼元教授是上海交通大学材料科学与工程学院讲席教授。1988年毕业于日本大阪府立大学应用化学专业，工学博士。先后在日本DIC公司和Sharp公司工作了18年，从事光电转换材料和器件的研究。2008年被邀请到日本国立物质材料研究所担任下一代太阳电池中心主任。2010年成为上海交通大学特聘教授。韩礼元教授在提高太阳能电池的转换效率和模块技术创新上有很高的造诣。通过对染料敏化太阳能电池的电子传运机理深入系统的研究，率先提出了电池的等效回路模型, 多次打破染料敏化太阳能电池器件和模块的转换效率世界记录。近年来，他致力于钙钛矿太阳能电池的研究。在钙钛矿太阳能电池高效率器件制备，大面积模块开发，稳定性等方面做出了卓越贡献。相关工作被发表在Science，Nature等杂志上。此外，韩礼元教授在Nature Energy，Nature Communication，Energy&Environmental Science，Advanced Material等世界顶尖期刊上发表了200多篇高水平学术论文，申请专利150多项。今后的主要研究方向是开发大面积，高效率，高稳定性的钙钛矿太阳能电池，推动该电池产业化进程。为解决能源短缺，缓解环境污染等问题做出应有的贡献。
Perovskite solar cells (PSC) unprecedentedly developed in recent years due to its excellent photovoltaic performance and simple solution processing method. Currently, the energy conversion efficiency of over 22% was achieved with small cell size. Here I will introduce our main achievements in the fabrication of efficient and stable PSCs with large working area. The first recorded efficiency of perovskite solar cells with cell area over 1cm2 was obtained by using heavily doped inorganiccharge extraction layers with high conductivity. We also developed new structure with a perovskite-fullerene graded heterojunction (GHJ) to improve the electron collection and reduced recombination loss because of unbalanced carrier diffusion length at the inverted structure with Formamidinium based perovskites. Combined with additive engineering, an efficiency of 19.2% with cells size of > 1cm2 was certified at public test centre (AIST), which is the highest efficiency of invert perovskite solar cells.
For further enlargement of the cell to large-area module, the big challenge is to develop new deposition methods suitable for fabricating large-area perovskite films with low defects density. We proposed a soft-cover deposition method which enabled the fabrication of large-area and uniform perovskite films with large grains. The uniform perovskite film with an area of 51cm2 was successfully obtained. We recently synthesized a new non-solvent perovskite precursor and modified the soft-cover method by loading pressure before peeling off the polyimide film to control the thickness of films. The combination of this new precursor and deposition method led to the successful fabrication of perovskite module with an aperture area of 6 x 6 cm2, and an efficiency of 12.1% was certified at AIST, which was the first perovskite module efficiency record. Furthermore, I will also talk about the stability and the cost analysis issues of PSCs.