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Quantitatively Analyzing the Influence of Side Chains on Photovoltaic Properties of Polymer−Fullerene Solar Cells
Abstract
Conventional wisdom dictates that the band gap and energy levels of a conjugated polymer are primarily determined by the molecular structure of the conjugated backbone, while the solubilizing alkyl chains should have a negligible impact on these properties. Hence the side chains should have minimal impact on the short circuit current ( J sc ) and open circuit voltage ( V oc ) of corresponding polymer based bulk heterojunction (BHJ) solar cells. Contrary to the “conventional wisdom”, we demonstrate that the side chain of a low band gap polymer ( PNDT-DTBT ) significantly impacts the observed V oc and J sc of the corresponding BHJ solar cell with variations as much as 100%, depending upon the length and shape of these alkyl chains. The observed difference in V oc and J sc is quantitatively correlated with a pre-exponential dark current term, J so, which accounts for the intermolecular interactions in the polymer/PCBM blends.
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Citations
Cited by
Designing π-conjugated polymers for organic electronics
Guo, X., Baumgarten, M., & Müllen, K. (2013) · Progress in Polymer Science · doi:10.1016/j.progpolymsci.2013.09.005 · Cited by 836
Osaka, I., Kakara, T., Takemura, N., Koganezawa, T., & Takimiya, K. (2013) · Journal of the American Chemical Society · doi:10.1021/ja404064m · Cited by 308
Li, W., Yang, L., Tumbleston, J. R., Yan, L., Ade, H., & You, W. (2014) · Advanced Materials · doi:10.1002/adma.201305251 · Cited by 224
Self-citationVan Mierloo, S., Hadipour, A., Spijkman, M.-J., Van den Brande, N., Ruttens, B., Kesters, J., D’Haen, J., Van Assche, G., de Leeuw, D. M., Aernouts, T., et al. (2012) · Chemistry of Materials · doi:10.1021/cm203351t · Cited by 73
Metadata
- Authors
- Yang, L., Zhou, H., & You, W.
- Venue
- The Journal of Physical Chemistry C
- Publisher
- American Chemical Society (ACS)
- Published
- 2010-09-09
- Volume
- 114
- Issue
- 39
- Pages
- 16793-16800
- ISSN
- 1932-7447 (ISSN-L)
- 1932-7455
- OpenAlex
- W2082422848
- Cited by
- 226
- References
- 0
- FWCI
- 26.41
- Type
- journal article
- Language
- en
- Open access
- closed
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- Yang, L., Zhou, H., & You, W. (2010). Quantitatively Analyzing the Influence of Side Chains on Photovoltaic Properties of Polymer−Fullerene Solar Cells. The Journal of Physical Chemistry C. https://doi.org/10.1021/jp106640r
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