Photoconductivity of single-wall carbon nanotube films

被引：47

作者：

Fujiwara, A

Matsuoka, Y

Suematsu, H

Ogawa, N

Miyano, K

Kataura, H

Maniwa, Y

Suzuki, S

Achiba, Y

机构：

[1] Japan Adv Inst Sci & Technol, Sch Mat Sci, Tatsunokuchi, Ishikawa 9231292, Japan

[2] Japan Sci & Technol Corp, CREST, Kawaguchi, Saitama 3320012, Japan

[3] Univ Tokyo, Sch Sci, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

[4] Univ Tokyo, Sch Engn, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

[5] Univ Tokyo, Adv Sci & Technol Res Ctr, Meguro Ku, Tokyo 1538904, Japan

[6] Tokyo Metropolitan Univ, Dept Phys, Sch Sci, Tokyo 1920397, Japan

[7] Tokyo Metropolitan Univ, Dept Chem, Sch Sci, Tokyo 1920397, Japan

来源：

CARBON | 2004年 / 42卷 / 5-6期

关键词：

carbon nanotubes; photoconductivity; transport properties;

D O I：

10.1016/j.carbon.2003.12.063

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：

Time-resolved photoconductivity measurements were carried Out on single-wall carbon nanotube (SWNT) films at various temperatures. Photoconductivity excitation spectra show two clear peaks around 0.7 and 1.2 eV. Observed peaks in the spectra correspond to the optical absorption between symmetrical bands of semiconducting SWNTs. The analysis of this feature allows insight into the transport properties of semiconducting SWNTs. Signal profiles in the photoresponse at low temperatures depend strongly on the sample, while intensity of the photoresponse monotonously increases with a decrease in temperature for all samples. Photo-induced current for a sample decays rapidly after the laser pulse irradiation. For another sample, on the other hand, it decreases gradually and remains up to a few hundred nanoseconds, showing the existence of trapping sites in the nanotubes. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：919 / 922

页数：4

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