Long-lived delocalized electron states in quantum dots: A step-scan Fourier transform infrared study

被引：52

作者：

Shim, M

Shilov, SV

Braiman, MS

Guyot-Sionnest, P

机构：

[1] Univ Chicago, James Franck Inst, Chicago, IL 60637 USA

[2] Syracuse Univ, Dept Chem, Syracuse, NY 13244 USA

[3] Syracuse Univ, WM Keck Ctr Mol Elect, Syracuse, NY 13244 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2000年 / 104卷 / 07期

关键词：

D O I：

10.1021/jp994107o

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：

Visible light-induced IR absorption in colloidal CdSe quantum dots is observed by step-scan FTIR spectroscopy. Size dependence and the effect of surface modification are investigated. The introduction of surface hole trap states enhances and prolongs the IR absorption in photoexcited quantum dots. Our measurements reveal long-lived (>1 ms) delocalized electron states in 6 nm average diameter dots capped with thiocresol.

引用

页码：1494 / 1496

页数：3

共 23 条

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