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Issue 23, 2014
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The influence of binary processing additives on the performance of polymer solar cells

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Abstract

In this study, we report the investigation of the influence of binary processing additives, 1,8-octanedithiol (ODT) and 1-chloronaphthalene (CN) on the performance of polymer solar cells (PSCs). It was found that the power conversion efficiency (PCE) can be enhanced to 8.55% from the PSCs processed with binary processing additives as compared with ∼6.50% from the PSCs processed with either ODT or CN processing additives. With binary processing additives, the crystallinity of the electron donor polymer, poly[[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl][3-fluoro-2-[(2 ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl]], was elevated, which in turn facilitated charge transport within the bulk heterojunction (BHJ) layer, resulting in a high short-circuit current and large fill factor. By photophysical studies, we further found that the high PCE is majorly attributed to the minimized nongeminate recombination by controlling the kinetic film morphologies of the BHJ composite by binary solvent processing additives.

Graphical abstract: The influence of binary processing additives on the performance of polymer solar cells

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Article information


Submitted
29 Aug 2014
Accepted
20 Sep 2014
First published
22 Sep 2014

Nanoscale, 2014,6, 14297-14304
Article type
Paper

The influence of binary processing additives on the performance of polymer solar cells

C. Liu, X. Hu, C. Zhong, M. Huang, K. Wang, Z. Zhang, X. Gong, Y. Cao and A. J. Heeger, Nanoscale, 2014, 6, 14297
DOI: 10.1039/C4NR04958F

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