CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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A new perspective on optoelectric conversion in conjugated polymers |
Liu Wen(刘文) a), Zhang Ming-Hua(张明华) a), Li Hai-Hong(李海宏) a), Wang Yong-Juan(王永娟) a), and Liu De-Sheng(刘德胜)a)b)† |
a Physics and Information Engineering Department, Jining University, Qufu 273155, China; b School of Physics, Shandong University, Jinan 250100, China |
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Abstract Photoexcitation of a neutral soliton will create a polaron and a charged soliton. According to a tight-binding model and a nonadiabatic method, we investigate the dynamical process of these two photogenerated charge carriers in an external electric field. It is found that the polaron and the soliton can pass through each other, which excludes the possibility of carrier recombination that usually occurs in existing organic solar cells. The results indicate a more efficient way to realize the optoelectric conversion by photoexciting polymer materials with soliton defects. On the other hand, it is found that solitons take on greater stability than polarons during collision.
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Received: 06 June 2010
Revised: 07 November 2010
Accepted manuscript online:
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PACS:
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71.38.-k
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(Polarons and electron-phonon interactions)
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71.20.Rv
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(Polymers and organic compounds)
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Fund: Project supported by the Special Funds of the National Natural Foundation of China (Grant No. 11047148), and the Jining University Research Program, China (Grant No. 2010QNKJ04). |
Cite this article:
Liu Wen(刘文), Zhang Ming-Hua(张明华), Li Hai-Hong(李海宏), Wang Yong-Juan(王永娟), and Liu De-Sheng(刘德胜) A new perspective on optoelectric conversion in conjugated polymers 2011 Chin. Phys. B 20 037102
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