Exponential decay lifetimes of excitons in individual single-walled carbon nanotubes

被引：192

作者：

Hagen, A ^{[1
]}

Steiner, M

Raschke, MB

Lienau, C

Hertel, T

Qian, HH

Meixner, AJ

Hartschuh, A

机构：

[1] Max Planck Gesell, Fritz Haber Inst, Dept Phys Chem, D-12489 Berlin, Germany

[2] Univ Siegen, Dept Phys Chem, D-57068 Siegen, Germany

[3] Max Born Inst Nichtlineare Opt & Kurzzeitspekt, D-12489 Berlin, Germany

[4] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.95.197401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The dynamics of excitons in individual semiconducting single-walled carbon nanotubes was studied using time-resolved photoluminescence (PL) spectroscopy. The PL decay from tubes of the same (n,m) type was found to be monoexponential, however, with lifetimes varying between less than 20 and 200 ps from tube to tube. Competition of nonradiative decay of excitons is facilitated by a thermally activated process, most likely a transition to a low-lying optically inactive trap state that is promoted by a low-frequency phonon mode.

引用

页数：4

共 26 条

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