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Wanjung Kim, Namhun Kim, Jung Kyu Kim, Dr. Insun Park, Dr. Yeong Suk Choi, Dr. Dong Hwan Wang, Prof. Heeyeop Chae and Prof. Jong Hyeok Park Polymer Bulk Heterojunction Solar Cells with PEDOT:PSS Bilayer Structure as Hole Extraction Layer ChemSusChem 6

Version of Record online: 9 MAY 2013 | DOI: 10.1002/cssc.201200950

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Two layers are better than one: The systematic increase in power conversion efficiency of polymer solar cells (PSCs) is demonstrated by considering the charge carrier transfer and electric field strength of a device. The unexpected and greatly enhanced power conversion efficiency of PSCs is reported, which can be accomplished by using a PEDOT:PSS hole extraction bilayer. Two different model systems are studied: P3HT:PC60BM and PCDTBT:PC70BM.

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