Raman-scattering study of exciton-phonon coupling in PbS nanocrystals

被引：236

作者：

Krauss, TD

Wise, FW

机构：

[1] Department of Applied Physics, Cornell University, Ithaca

来源：

PHYSICAL REVIEW B | 1997年 / 55卷 / 15期

关键词：

CDSE QUANTUM DOTS; SEMICONDUCTOR MICROCRYSTALLITES; SIZE DEPENDENCE; RESONANCE RAMAN; ABSORPTION; PHOTOLUMINESCENCE; NANOSPHERES; STATES;

D O I：

10.1103/PhysRevB.55.9860

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The exciton-phonon coupling strength of PbS nanocrystals that strongly confine both charge carriers is investigated using resonant Raman scattering. The strength of this coupling (Huang-Rhys parameter S similar to 0.7) is four orders of magnitude greater than that predicted theoretically for the intrinsic states of the nanocrystal, but is the same order of magnitude as that measured for Cd(S,Se) nanocrystals. The large exciton-phonon coupling is consistent with one charge carrier being localized at the surface of the nanocrystal.

引用

收藏

页码：9860 / 9865

页数：6

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