Investigation of the Photoluminescence Properties and Nonlinear Optical Responses of CdTe/CdS Core/Shell Quantum Dots

被引：9
|
作者：
Pourjafari, S. [1 ]
Molaei, M. [2 ]
Saievar-Iranizad, E. [1 ]
Dehghani, Z. [1 ]
Majlesara, M. H. [3 ]
机构：
[1] Tarbiat Modares Univ, Dept Phys, Fac Sci, Tehran, Iran
[2] Valieasr Univ, Fac Sci, Dept Phys, Rafsanjan, Iran
[3] Tarbiat Moallem Univ, Fac Sci, Dept Phys, Tehran, Iran
来源：
SYNTHESIS AND REACTIVITY IN INORGANIC METAL-ORGANIC AND NANO-METAL CHEMISTRY | 2012年 / 42卷 / 08期
关键词：
CdTe/CdS Core/shell QDs; nonlinear optical responses; photoluminescence properties; Z-scan technique; LIGHT-EMITTING-DIODES; Z-SCAN; NANOCRYSTALS; ELECTROLUMINESCENCE; NANOPARTICLES; BRIGHT; SIZE;
D O I：
10.1080/15533174.2011.614996
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Photoluminescence and nonlinear optical properties of CdTe/CdS core/shell quantum dots (QDs) have been investigated in this work. X-ray diffraction analysis demonstrated cubic crystalline structure for synthesized QDs with an average size around 8 nm. Transmission electron microscope image indicated spherical core/shell QDs. Increase of the photoluminescence quantum efficiency of QDs, confirmed formation of core/shell structure. The obtained positive sign for nonlinear refractive index indicated a self-focusing effect. The linear absorption coefficient (alpha) was obtained about 1.17 cm(-1). The nonlinear refractive index was in order of 10(-8) cm(2)/W and the nonlinear absorption coefficient was obtained in order of 10(-3) cm(2)/W with a negative sign.
引用
收藏
页码：1060 / 1063
页数：4
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