Citation: CHEN Ting, HU Xiao-Bo, XU Yan-Qiao, WANG Lian-Jun, JIANG Wan, JIANG Wei-Hui, XIE Zhi-Xiang. Hydrothermal Synthesis and Fluorescence Properties of AgInS₂/ZnS Core/Shell Quantum Dots[J]. Chinese Journal of Inorganic Chemistry, ;2020, 36(1): 69-78. doi: 10.11862/CJIC.2020.024 shu

Hydrothermal Synthesis and Fluorescence Properties of AgInS₂/ZnS Core/Shell Quantum Dots

CHEN Ting ^1,2,, ,
HU Xiao-Bo ^1,3 ,
XU Yan-Qiao ¹ ,
WANG Lian-Jun ^2,3 ,
JIANG Wan ^2,3 ,
JIANG Wei-Hui ^1,2 ,
XIE Zhi-Xiang ¹

1.
School of Material Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen, Jiangxi 333001, China
2.
National Engineering Research Center for Domestic & Building Ceramics, Jingdezhen, Jiangxi 333001, China
3.
College of Materials Science and Engineering, Donghua University, Shanghai 201620, China

Corresponding author: CHEN Ting, chenting@jci.edu.cn
Received Date: 16 May 2019
Revised Date: 12 October 2019

Figures(10)

Water-soluble AgInS₂/ZnS (AIS/ZnS) core/shell quantum dots (QDs) were synthesized by hydrothermal method using thiourea (TU) as sulfur source, glutathione (GSH) and sodium citrate (SC) as ligands. The effects of reaction temperature and addition amount of ligands on the synthesis and fluorescence properties of AIS/ZnS QDs were systematically studied by XRD, TEM, UV-Vis absorption spectra and PL spectra, respectively, and their stability was also investigated. The results show that the emissive intensity of AIS/ZnS core/shell QDs is significantly improved by increasing the reaction temperature from 70 to 90℃. The increase of temperature promotes the growth of ZnS shell, on which the surface defects is effectively passivated. Meanwhile, the emissive peak showed a blue-shift from 600 nm to 580 nm. Furthermore, the ligands could balance the chemical reactivity of Zn²⁺, slow the growth rate of ZnS shell, inhibit the interface defects formation and eliminate the surface states. The AIS/ZnS core/shell QDs showed the strongest emission with n_GSH/n_Zn²⁺ of 2.0 and n_SC/n_Zn²⁺ of 2.5. Importantly, the obtained AIS/ZnS core/shell QDs exhibited excellent optical stability.
- quantum dot,
- hydrothermal synthesis,
- core-shell structure,
- emissive intensity,
- stability
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沈阳化工大学材料科学与工程学院沈阳 110142

Hydrothermal Synthesis and Fluorescence Properties of AgInS2/ZnS Core/Shell Quantum Dots

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通讯作者: 陈斌, bchen63@163.com

Hydrothermal Synthesis and Fluorescence Properties of AgInS₂/ZnS Core/Shell Quantum Dots