| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Nanoscale Phase Separation-Induced Suppression of Geminate Recombination in Low Bandgap Polymer-Fullerene Solar Cells |
| LIU Jian1, WU Jiang1, SHAO Shu-Yan1, XIE Zhi-Yuan1**, GUO Shi-Jie2** |
1State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
2The First Bethune Hospital of Jilin University, Changchun 130021
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| Cite this article: |
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LIU Jian, WU Jiang, SHAO Shu-Yan et al 2014 Chin. Phys. Lett. 31 058801 |
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Abstract The short-circuit current of polymer solar cells based on a PCPDTBT:PC71BM blend is substantially increased by using a processing additive. It is found that the significant geminate recombination in the PCPDTBT:PC71BM blend film is dramatically suppressed by using a processing additive which can produce a nanoscale PCPDTBT and PC71BM phase separation. The processing additive-induced aggregation of PCPDTBT polymer chains and PC71BM molecules can give rise to a driving force for the separation of charge-transfer states at the donor/acceptor interfaces into the free charge carriers and thus geminate recombination is suppressed.
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Published: 24 April 2014
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| PACS: |
88.40.jr
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(Organic photovoltaics)
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88.40.hj
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(Efficiency and performance of solar cells)
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73.63.-b
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(Electronic transport in nanoscale materials and structures)
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