Multiple Exciton Generation in Single-Walled Carbon Nanotubes

被引：125

作者：

Wang, Shujing ^{[1
,2
]}

Khafizov, Marat ^{[1
,2
]}

Tu, Xiaomin ^{[3
]}

Zheng, Ming ^{[3
]}

Krauss, Todd D. ^{[1
,2
]}

机构：

[1] Univ Rochester, Dept Chem, Rochester, NY 14627 USA

[2] Univ Rochester, Inst Opt, Rochester, NY 14627 USA

[3] NIST, Gaithersburg, MD 20899 USA

来源：

NANO LETTERS | 2010年 / 10卷 / 07期

关键词：

Single-walled carbon nanotubes; ultrafast optical spectroscopy; multiple exciton generation; carrier multiplication; excited-state dynamics; ULTRAFAST CARRIER DYNAMICS; IMPACT IONIZATION; QUANTUM DOTS; MULTIPLICATION; PBSE; EFFICIENCY; SPECTROSCOPY;

D O I：

10.1021/nl100343j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Upon absorption of single photons, multiple excitons were generated and detected in semiconducting single-walled carbon nanotubes (SWNTs) using transient absorption spectroscopy For (6,5) SWNTs, absorption of single photons with energies corresponding to three times the SWNT energy gap results in an exciton generation efficiency of 130% per photon Our results suggest that the multiple exciton generation threshold in SWNTs can be close to the limit defined by energy conservation

引用

页码：2381 / 2386

页数：6

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