Temperature dependence of the band gap of colloidal CdSe/ZnS core/shell nanocrystals embedded into an ultraviolet curable resin

被引：24

作者：

Joshi, Abhishek

Narsingi, K. Y.

Manasreh, M. O.

Davis, E. A.

Weaver, B. D.

机构：

[1] Univ Arkansas, Dept Elect Engn, Fayetteville, AR 72701 USA

[2] Norfolk State Univ, Dept Opt Engn, Norfolk, VA 23504 USA

[3] USN, Res Lab, Washington, DC 20375 USA

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 13期

关键词：

D O I：

10.1063/1.2357856

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Optical absorption and photoluminescence techniques were used to investigate the energy band gap of CdSe/ZnS core/shell nanocrystals matrixed into a resin. The band gap is measured as a function of temperature for several samples with different nanocrystal diameters. Debye and Einstein temperatures were obtained by fitting the energy band gap using two different empirical expressions. Stokes shift was estimated by taking the difference between the first exciton and emission peaks. The Stokes shift was found to increase as the nanocrystal diameter is decreased suggesting a stronger electron-phonon coupling in smaller size nanocrystals. (c) 2006 American Institute of Physics.

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页数：3

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