Effects of Na+ ions on fluorescence properties of ZnSe quantum dots synthesized in an aqueous system

被引：5

作者：

Liu, Bitao ^{[1
]}

Yu, Haiyan ^{[1
]}

Wang, Ya ^{[1
]}

Peng, Lingling ^{[1
]}

Han, Tao ^{[1
]}

Tian, Liangliang ^{[1
]}

Yan, Litao ^{[2
]}

机构：

[1] Chongqing Univ Arts & Sci, Res Inst New Mat Technol, Chongqing 402160, Peoples R China

[2] New Mexico State Univ, Dept Chem Engn, Las Cruces, NM 88003 USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 640卷

关键词：

ZnSe; Semiconductors; Luminescence; Optical properties; SEMICONDUCTOR NANOCRYSTALS; DOPED ZNSE; PHOTOCATALYTIC ACTIVITY; HIGHLY LUMINESCENT; SIZE; EMISSION; PH; PHOTOLUMINESCENCE; CYTOTOXICITY; GLUTATHIONE;

D O I：

10.1016/j.jallcom.2015.03.206

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The ZnSe quantum dots (QDs) were synthesized in an aqueous system by introducing excess Na+ ions, which were characterized by Photoluminescence (PL), PL decay curves, UV-Vis absorption spectrum (ABs), X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). The results indicate that the particle size of ZnSe QDs were about 4 nm when Na+ ions were present in excess, which was bigger than that of ZnSe QDs (about 2 nm) synthesized in the solution without Na+ ions. An unexpected emission peak around 590 nm was observed when the concentration of Na+ ions was high enough in the reaction solution. This emission peak could be attributed to the selenium vacancies (SVs). (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：246 / 252

页数：7

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