Observation of Charged Excitons in Hole-Doped Carbon Nanotubes Using Photoluminescence and Absorption Spectroscopy

被引：179

作者：

Matsunaga, Ryusuke ^{[1
]}

Matsuda, Kazunari ^{[1
]}

Kanemitsu, Yoshihiko ^{[1
,2
]}

机构：

[1] Kyoto Univ, Inst Chem Res, Kyoto 6110011, Japan

[2] Kyoto Univ, Photon & Elect Sci & Engn Ctr, Kyoto 6158510, Japan

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 03期

关键词：

FLUORESCENCE;

D O I：

10.1103/PhysRevLett.106.037404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first observation of trions (charged excitons), three-particle bound states consisting of one electron and two holes, in hole-doped carbon nanotubes at room temperature. When p-type dopants are added to carbon nanotube solutions, the photoluminescence and absorption peaks of the trions appear far below the E-11 bright exciton peak, regardless of the dopant species. The unexpectedly large energy separation between the bright excitons and the trions is attributed to the strong electron-hole exchange interaction in carbon nanotubes.

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页数：4

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