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Issue 13, 2010
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Origin of the enhanced open-circuit voltage in polymer solar cellsvia interfacial modification using conjugated polyelectrolytes

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Abstract

It has been previously shown that incorporating alcohol/water-soluble conjugated polyelectrolytes (CPEs) as cathode interlayers can substantially enhance the open-circuit voltage (Voc) of bulk heterojunction polymer solar cells (PSCs). This improvement is attractive since there are only a few solution-based processing technologies that can enhance the Voc. In this article, the Voc enhancement effect of five distinct CPE materials was studied on three typical PSC device configurations, each using different donor materials. Significant Voc enhancement was observed in devices that contain a polyfluorene copolymer as the donor material. The origin of the Voc enhancement was investigated by examination of the dark currents.

Graphical abstract: Origin of the enhanced open-circuit voltage in polymer solar cells via interfacial modification using conjugated polyelectrolytes

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Article information


Submitted
19 Oct 2009
Accepted
07 Jan 2010
First published
09 Feb 2010

J. Mater. Chem., 2010,20, 2617-2622
Article type
Paper

Origin of the enhanced open-circuit voltage in polymer solar cells via interfacial modification using conjugated polyelectrolytes

C. He, C. Zhong, H. Wu, R. Yang, W. Yang, F. Huang, G. C. Bazan and Y. Cao, J. Mater. Chem., 2010, 20, 2617
DOI: 10.1039/B921775D

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