Extinction and luminescence coefficients of CdSe/CdTe, CdTe/CdSe, and CdTe/CdS heterostructures based on colloidal CdSe and CdTe nanocrystals

被引：7

作者：

Dirin, D. N. ^{[1
]}

Sokolikova, M. S. ^{[1
]}

Gaskov, A. M. ^{[1
]}

Vasilev, R. B. ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Moscow 117234, Russia

来源：

JOURNAL OF OPTICAL TECHNOLOGY | 2011年 / 78卷 / 11期

基金：

俄罗斯基础研究基金会;

关键词：

INVERTED CORE/SHELL NANOCRYSTALS; ABSORPTION CROSS-SECTION; QUANTUM DOTS; OPTICAL-PROPERTIES; SEMICONDUCTOR NANOCRYSTALS; SEEDED GROWTH; LOCALIZATION; CONFINEMENT; ROD; SE;

D O I：

10.1364/JOT.78.000693

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

This paper discusses the optical properties of colloidal CdSe/CdTe, CdTe/CdSe, and CdTe/CdS heterostructures synthesized by growing a shell on CdSe and CdTe nanocrystals. The extinction coefficients of the first exciton absorption band and the extinction coefficients at 400 nm are determined as a function of the amount of shell material added during the growth of the heterostructures. It is shown that the resulting heterostructures have extinction coefficients 1-2 orders of magnitude greater than the initial cores: up to 0.3 x 10(7) cm(-1) M-1 in the case of CdTe/CdS and CdTe/CdSe and up to 1.6 x 10(7) cm(-1) M-1 in the case of CdSe/CdTe. It is shown that the luminescence wavelength in the 550-950-nm range can be controlled by varying the shell size for CdSe/CdTe heterostructures. (C) 2011 Optical Society of America.

引用

页码：693 / 698

页数：6

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