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JST Press Release

27th February 2013
Japan Science and Technology Agency (JST)
5-3, Yonbancho, Chiyoda-ku, Tokyo 102-8666
URL http://www.jst.go.jp/EN/index.html

Elucidation of the deterioration mechanism of polymer solar cells generating electricity

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.

Researcher Information

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 "

Journal Information

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.
doi: 10.1002/adma.201204015


[About Research]
Kazuhiro Marumoto Ph.D.,
Associate Professor, Division of Materials Science, University of Tsukuba

[About Program]
Department of Innovation Research, Japan Science and Technology Agency
Fumiharu Kimura,


JST, an integrated organization of science and technology in Japan, establishes an infrastructure for the entire process from the creation of knowledge to the return to the society. For more information, visit http://www.jst.go.jp/EN/