Synthesis and optical properties of composition-tunable and water-soluble ZnxCd1-xTe alloyed nanocrystals

被引：17

作者：

Wang, Yan ^{[1
]}

Hou, Yanbing ^{[1
]}

Tang, Aiwei ^{[1
]}

Feng, Bin ^{[1
]}

Li, Yan ^{[1
]}

Liu, Jun ^{[1
]}

Teng, Feng ^{[1
]}

机构：

[1] Beijing Jiaotong Univ, Minist Educ, Inst Optelect Technol, Key Lab Luminescence & Opt Informat, Beijing 100044, Peoples R China

来源：

JOURNAL OF CRYSTAL GROWTH | 2007年 / 308卷 / 01期

基金：

中国国家自然科学基金;

关键词：

characterization; optical properties; photoluminescence; alloys; nanomaterials; semiconducting ternary compounds;

D O I：

10.1016/j.jcrysgro.2007.07.045

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

ZnxCd1-xTe alloyed nanocrystals with different compositions (x = 0, 0.3, 0.5, 0.7) have been synthesized in aqueous solution with thioglycolic acid (TGA) as stabilizer. The samples have been characterized by X-ray diffraction pattern (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HR-TEM), and X-ray photoelectron spectra (XPS). The optical properties of the alloyed nanocrystals have been investigated by UV-vis absorption and phototuminescence (PL) spectroscopy. Composition-dependent absorption and PL spectra are observed for ZnxCd1-xTe alloyed nanocrystals with increasing Zn content. The highest PL quantum yield (QY) of obtained ZnxCd1-xTe alloyed nanocrystals is 20.2%. The effect of refluxing time and synthesis temperature on the optical properties of the alloyed nanocrystals has also been investigated. The PL peak position of ZnxCd1-xTe alloyed nanocrystals does not show significant shift under different excitation wavelengths. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：19 / 25

页数：7

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