讲座题目：Organic heterojunctions in binary and ternary organic solar cells 主讲人：Mats Fahlman 教授 主持人🙅🏿♀️：保秦烨 开始时间：2019-10-28 13:00:00 讲座地址🧙🏼：闵行校区信息楼147报告厅 主办单位：物理与电子科学学院、极化材料与器件教育部重点实验室
报告人简介🧹： Prof. Mats Fahlman received his MSc in Engineering Physics (1991) and PhD in Surface Physics and Chemistry (1995) from Linkoping University. He currently holds an endowed chair in Surface Physics and Chemistry at the Laboratory of Organic Electronics, Linköping University. He is active in the research of organic semiconductors with over 200 publications, using primarily surface science techniques to explore materials and interfaces as well as their effect on device properties. Prof. Fahlman is also active in synchrotron radiation research, currently serving as a member of the Scientific Advisory Committee of MAX IV and was prior a member of the Board of Directors for ten years. He is the recipient of the European Union Descartes Prize and the Göran Gustafsson Prize in Physics. 报告内容◻️： Matched energy level alignment is a key requirement for efficient organic devices such as organic light-emitting diodes, photovoltaics, and transistors.1 In organic solar cells (OSCs), the organic-organic heterojunctions are of special importance as they effect both charge generation2 and open circuit voltage,3 and by tuning them in binary3 and ternary devices,4 an optimized performance can be obtained. Thermal annealing and additives are other approaches that are widely used to optimize the performance of OSCs as discussed in a recent review,5 and thermal annealing/stress is also necessary and unavoidable in large scale production of OSCs. Large efforts have been devoted to reveal the effect of the thermal annealing on morphology and to understand the correlation between change in morphology and device properties of OSCs in both fullerene and non-fullerene based OSCs.6,7 The effect of thermal stress/annealing on energy level alignment and related properties of the devices are less discussed, however, compared to the extensively explored effect on morphology and corresponding device performance. Here we discuss energy level alignment at heterojunctions in OSC, their effect on device performance and use all polymer solar cells to demonstrate thermal annealing effect on energy level alignment and the corresponding effect on the device properties.7 1. Nature Rev. Mater., 2019, DOI: 10.1038/s41578-019-0127-y; Adv. Mater. Interfaces 2019, 6, 1800897. 2. Adv. Energy Mater., 2011, 1, 792. 3. Adv. Funct. Mater. 2014, 24, 6309. 4. Nano Energy, 2017, 37, 24; Adv. Energy Mater., 2017, 6, 1700390. 5. Adv. Energy Mater. 2017, 7, 1602242 6. Nat. Mater. 2008, 7, 158 7. Nat. Mater. 2017, 17, 363 |
