Size-dependent two-photon excitation spectroscopy of CdSe nanocrystals

被引：88

作者：

Schmidt, ME

Blanton, SA

Hines, MA

GuyotSionnest, P

机构：

[1] James Franck Institute, University of Chicago, Chicago, IL 60637

来源：

PHYSICAL REVIEW B | 1996年 / 53卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.53.12629

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two-photon excitation spectra of highly monodisperse colloidal CdSe nanocrystals with sizes ranging from 22 to 43 Angstrom are compared to one-photon excitation data and to a spherically confined effective-mass model. The main experimental features are well described by this model. However, the first one-photon and two-photon transitions appear indistinguishable, though the model predicts a 20-meV splitting. This discrepancy may reflect the sensitivity of the band-edge structure to deviations from the assumed spherical symmetry.

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页码：12629 / 12632

页数：4

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