Direct Observation of Kinetics of Dissociation of Polaron Pairs in Electrical Field
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概要
- 論文の詳細を見る
Kinetics of decay of polaron pairs as precursors of free charge carriers upon photoexcitation of poly(3-octylthiphene) films was observed directly within a picosecond time domain by using the two-correlated-pulses laser technique. Experiments showed that polaron pairs were generated without any noticeable delay after the light absorption. Two kinds of polaron pairs with lifetimes of about $\tau_{1}\approx 10$ ps and $\tau_{2}\approx 200$ ps were revealed the lifetimes were temperature-independent in the zero electrical field. The value of $\tau_{2}$ was shown to decrease in a higher electrical field reaching about 30 ps at $E=10^{5}$ V/cm. Free charge carriers appear as a result of the pair dissociation.
- 2003-05-15
著者
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Fujii Akihiko
Department Of Electrical Electronic And Informational Engineering Osaka University
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Frankevich Eugene
Institute Of Energy Problems Of Chemical Physics Russian Academy Of Sciences
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Yoshino Katsumi
Department Of Electrical Engineering Faculty Of Engineering Osaka University
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Ozaki Masanori
Department Of Electrical Electronic And Informational Engineering Osaka University
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Nishihara Yusuke
Department Of Electronic Engineering Graduate School Of Engineering Osaka University
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Nishihara Yusuke
Department of Electronic Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
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Frankevich Eugene
Institute of Energy Problems of Chemical Physics, Russian Academy of Sciences, Moscow 334, Russia
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Fujii Akihiko
Department of Electronic Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
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