Improving photovoltaic properties via electric-field-induced orientation of conjugated polymer

A high electric field is applied to polarize the undoped MEH-PPV and the MEH-PPV: C 60 composite thin film in the process of spin-coating. Due to the polarization causing the orientation of the MEH-PPV chains, the resulting thin-film devices show improved photovoltaic properties. For undoped MEH-PPV...

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Bibliographic Details
Published in:Solid state communications 2006-12, Vol.140 (11), p.555-558
Main Authors: Jin, Hui, Hou, Yanbing, Shi, Quanming, Meng, Xianguo, Teng, Feng
Format: Article
Language:English
Subjects:
A. Polymer
Composite materials
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Conductivity of specific materials
D. Photovoltaic
Electronic transport in condensed matter
Exact sciences and technology
Photoconduction and photovoltaic effects
photodielectric effects
Physics
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Summary:A high electric field is applied to polarize the undoped MEH-PPV and the MEH-PPV: C 60 composite thin film in the process of spin-coating. Due to the polarization causing the orientation of the MEH-PPV chains, the resulting thin-film devices show improved photovoltaic properties. For undoped MEH-PPV devices, oriented under the electric field of 6×10 3 V cm −1, the short-circuit current ( J sc ) and the external quantum efficiency (EQE) are enhanced by a factor of 2.5 and 2, respectively. For MEH-PPV–fullerene composite devices, oriented under the same field, the J sc and the EQE are improved by a factor of 1.8 and 1.7, respectively.
ISSN:0038-1098
1879-2766
DOI:10.1016/j.ssc.2006.08.053