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Influence of the Molecular Weight of Poly(3-hexylthiophene) on the Performance of Bulk Heterojunction Solar Cells
Abstract
The efficiency of poly(3-hexylthiophene) (P3HT)/[6,6]-phenyl C 61 butyric acid methyl ester (PCBM) bulk heterojunction solar cells dramatically depends on the molecular weight of the donor polymer P3HT. Only for P3HTs with a number-average molecular weight ( M n ) of >10 000 have high power conversion efficiencies of >2.5% been reached. This behavior is caused by distinctly reduced charge carrier (hole) mobility in the donor phase of the devices built from lower M n P3HT samples. The reduced performance of such devices is related to a reduced intermolecular ordering (π-stacking) of the P3HT phase. These findings highlight the important role of the molecular weight in semicrystalline semiconducting polymers for the device performance and may help in the further development of novel, efficient, lower band gap donor polymers for photovoltaic applications.
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Cited by
Toward a Rational Design of Poly(2,7-Carbazole) Derivatives for Solar Cells
Blouin, N., Michaud, A., Gendron, D., Wakim, S., Blair, E., Neagu-Plesu, R., Belletête, M., Durocher, G., Tao, Y., & Leclerc, M. (2008) · Journal of the American Chemical Society · doi:10.1021/ja0771989 · Cited by 1,370
Bulk Heterojunction Solar Cells: Morphology and Performance Relationships
Huang, Y., Kramer, E. J., Heeger, A. J., & Bazan, G. C. (2014) · Chemical Reviews · doi:10.1021/cr400353v · Cited by 1,249
Dang, M. T., Hirsch, L., Wantz, G., & Wuest, J. D. (2013) · Chemical Reviews · doi:10.1021/cr300005u · Cited by 587
Design and Synthesis of Molecular Donors for Solution-Processed High-Efficiency Organic Solar Cells
Coughlin, J. E., Henson, Z. B., Welch, G. C., & Bazan, G. C. (2014) · Accounts of Chemical Research · doi:10.1021/ar400136b · Cited by 485
Kang, H., Uddin, M. A., Lee, C., Kim, K.-H., Nguyen, T. L., Lee, W., Li, Y., Wang, C., Woo, H. Y., & Kim, B. J. (2015) · Journal of the American Chemical Society · doi:10.1021/ja5123182 · Cited by 381
Metadata
- Authors
- Schilinsky, P., Asawapirom, U., Scherf, U., Biele, M., & Brabec, C. J.
- Venue
- Chemistry of Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 2005-03-23
- Volume
- 17
- Issue
- 8
- Pages
- 2175-2180
- ISSN
- 0897-4756 (ISSN-L)
- 1520-5002
- OpenAlex
- W2019213642
- Cited by
- 400
- References
- 0
- FWCI
- 23.83
- Type
- journal article
- Language
- en
- Open access
- closed
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- Schilinsky, P., Asawapirom, U., Scherf, U., Biele, M., & Brabec, C. J. (2005). Influence of the Molecular Weight of Poly(3-hexylthiophene) on the Performance of Bulk Heterojunction Solar Cells. Chemistry of Materials. https://doi.org/10.1021/cm047811c
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