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Improvement of the power conversion efficiency of polymeric solar cells based on P3HT:PCBM through interfacial modification

Published online by Cambridge University Press:  29 July 2011

Shizhao Zheng ,
Xianyu Deng  and
King Y. Wong
Shizhao Zheng
Affiliation:
Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.
Xianyu Deng
Affiliation:
Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China. Research Center for Advanced Functional Materials and Devices, School of Materials Science and Engineering, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China.
King Y. Wong*
Affiliation:
Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.
*
*E-mail: [email protected]
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Abstract

We report the study of a process which enhances the power conversion efficiency (PCE) of solar cells employing poly(3-hexythiophene) and [6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PCBM). In this process, the spin-coated solution of the active material was maintained in the liquid state for a prolonged duration. It was observed that through this process, the PCE of the device was enhanced by 31% for the case of a fast-grown film. It also provided a further 19% enhancement on top of the enhancement obtained by the familiar solvent annealing process. We found that this process depends critically on the presence of a poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) buffer layer. It is hypothesized that the action of this enhancement process involves the interfacial interactions between P3HT and PEDOT polymers.

Keywords

photovoltaicpolymerorganic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1322: Symposium B – Third-Generation and Emerging Solar-Cell Technologies , 2011 , mrss11-1322-b05-27
Copyright
Copyright © Materials Research Society 2011

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References

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