We elucidated the states of charges accumulated in polymer solar cells by light irradiation, and found a clear correlation between the accumulated charges and the performance deterioration for the first time in the world. By contriving device-fabrication processes for avoiding charge accumulation, we can prevent the deterioration and improve the durability further, which can greatly contribute to the research and development of polymer solar cells including efficiency improvement and the acceleration of the practical use.
JST PRESTO Research Area "Photoenergy conversion systems and materials for the next generation solar cells",
Research Theme : " Elucidation of Degradation Mechanism of Organic Thin-Film Solar Cells from Microscopic Viewpoints and Improvement of Device Durability "
Tatsuya Nagamori and Kazuhiro Marumoto “Direct Observation of Hole Accumulation in Polymer Solar Cells During Device Operation using Light-Induced Electron Spin Resonance”
Advanced Materials, Volume 25, Issue 16, pages 2362–2367.
Kazuhiro Marumoto Ph.D.,
Associate Professor, Division of Materials Science, University of Tsukuba
Department of Innovation Research, Japan Science and Technology Agency