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Issue 36, 2010
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Towards optimization of P3HT:bisPCBM composites for highly efficient polymer solar cells

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Abstract

The optimization of the polymer solar cells based on regioregular poly(3-hexylthiophene) (P3HT) and the bisadduct of phenyl C61-butyric acid methyl ester (bisPCBM) is studied thoroughly as a role of solvent-annealing effect as well as different concentration of bisPCBM. In the case of P3HT:bisPCBM of 1 : 0.8 w/w, more balanced electron and hole mobilities are observed, resulting in better performance of the solar cells. Under the best balance conditions such as P3HT:bisPCBM of 1 : 0.8 w/w, the solvent annealing is employed to further clarify the optimization of the devices. Such a treatment leads to the formation of crystalline P3HT domains in the blend films, which is determined by X-ray diffraction, UV-vis spectroscopy, and atomic force microscopy. From our experiment, one can conclude that the best power conversion efficiency of 3.75% is achieved in a layered structure of P3HT:bisPCBM of 1 : 0.8 w/w for a solvent-annealing time of 24 h.

Graphical abstract: Towards optimization of P3HT:bisPCBM composites for highly efficient polymer solar cells

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Supplementary files

Article information


Submitted
22 Mar 2010
Accepted
08 Jun 2010
First published
02 Aug 2010

J. Mater. Chem., 2010,20, 7710-7714
Article type
Paper

Towards optimization of P3HT:bisPCBM composites for highly efficient polymer solar cells

M. H. Yun, G. Kim, C. Yang and J. Y. Kim, J. Mater. Chem., 2010, 20, 7710
DOI: 10.1039/C0JM00790K

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