Increase in the mobility of photogenerated positive charge carriers in polythiophene

被引：56

作者：

Saeki, A

Seki, S

Koizumi, Y

Sunagawa, T

Ushida, K

Tagawa, S

机构：

[1] Osaka Univ, Inst Sci & Ind Res, Ibaraki, Osaka 5670047, Japan

[2] Fukui Univ Technol, Fukui, Fukui 9108505, Japan

[3] RIKEN, Wako, Saitama 3510198, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2005年 / 109卷 / 20期

关键词：

D O I：

10.1021/jp0442145

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report the increase in the mobility of charge carriers in regioregular poly 3-hexyl thiophene (RR-P3HT) films by mixing them with tetracyanoethylene (TCNE), which is examined by in situ time-resolved microwave conductivity (TRMC) and transient optical spectroscopy (TOS). TCNE acts not only as an electron acceptor which increases the number of charge carriers on photoexposure but also as a functional additive which enhances the mobility of the charge carriers. This conclusion was deduced from the results of fluorescence quenching, transient optical absorption and photobleaching, and comparison of the TRMC signal with the TOS signal. The combination of the TRMC and TOS techniques represents a comprehensive and fully experimental approach to the determination of the intrinsic carrier mobility in conjugated polymers.

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页码：10015 / 10019

页数：5

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