Solvent-dependent Optical Properties of MoS<sub>2</sub> Quantum Dots

ZHANG Jia-qi; CHU Xue-ying; LI Jin-hua; XU Ming-ze; JIN Fang-jun

doi:10.3788/fgxb20194011.1359

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Solvent-dependent Optical Properties of MoS₂ Quantum Dots

Synthesis and Properties of Materials | 更新时间：2020-08-12

- Solvent-dependent Optical Properties of MoS₂ Quantum Dots
- Chinese Journal of Luminescence Vol. 40, Issue 11, Pages: 1359-1364(2019)
- 作者机构：
  
  长春理工大学理学院,吉林长春,130022
- 作者简介：
- 基金信息：
  
  Supported by "111"Project of China(D17017);National Natural Science Foundation of China(21703017,11604024);Advance Research Project of Weapon and Equipment(6140414020102);Developing Project of Science and Technology of Jilin Province(20180519017JH);International Science and Technology Cooperation Project of Jilin Province(20190701029GH);Project of Education Department of Jilin Province(JJKH20190551KJ,JJKH20181101KJ,JJKH20181106KJ);China Postdoctoral Science Foundation(2019M651181);Youth Fund and Technology Innovation Fund of Changchun University of Science and Technology(XQNJJ-2018-03,XJJLG-2018-01)
- DOI：10.3788/fgxb20194011.1359
  CLC： O469
- Received：21 June 2019，
  
  Revised：16 July 2019，
  
  Published Online：26 July 2019，
  
  Published：05 November 2019
- 稿件说明：
移动端阅览
张家旗, 楚学影, 李金华等. 溶剂依赖的MoS₂量子点光学性质[J]. 发光学报, 2019,40(11): 1359-1364

ZHANG Jia-qi, CHU Xue-ying, LI Jin-hua etc. Solvent-dependent Optical Properties of MoS₂ Quantum Dots[J]. Chinese Journal of Luminescence, 2019,40(11): 1359-1364
张家旗, 楚学影, 李金华等. 溶剂依赖的MoS₂量子点光学性质[J]. 发光学报, 2019,40(11): 1359-1364 DOI： 10.3788/fgxb20194011.1359.

ZHANG Jia-qi, CHU Xue-ying, LI Jin-hua etc. Solvent-dependent Optical Properties of MoS₂ Quantum Dots[J]. Chinese Journal of Luminescence, 2019,40(11): 1359-1364 DOI： 10.3788/fgxb20194011.1359.

摘要

为了明确溶剂对MoS

量子点发光的影响，以液相剥离法在N-甲基吡咯烷酮（NMP）与1，2-二氯苯（DCB）的混合溶剂中制备了MoS

量子点，并采用透析的方法对照研究了溶剂及含有MoS

量子点的溶液的发光性质。结果表明，量子点尺寸分布均匀，粒径约2.4 nm。拉曼光谱中可在381 cm

-1

和406 cm

-1

处观察到MoS

材料的E

和A

拉曼特征峰。光学性质分析表明，MoS

量子点的存在造成了260~400 nm附近紫外光吸收的明显变化，且混合溶剂中的MoS

量子点荧光发射波长对激发波长表现出严重的依赖性。以水为外部环境的透析实验结果表明，透析后DCB溶剂的HOMO能级会导致MoS

量子点在442 nm附近的发光出现多个发射峰，但其发光波长不再随激发波长而改变，进而说明有机溶剂中MoS

量子点发光对激发波长的依赖性是由于有机溶剂在紫外光激发下发光造成的。

Abstract

In order to elucidate the effect of solvent on the luminescence of MoS

quantum dots

MoS

quantum dots were prepared by liquid phase stripping method in a mixed solvent of N-Methyl pyrrolidone(NMP) and 1

2-dichlorobenzene(DCB). The dialysis method was utilized to compare the luminescent properties of the solvent and the solution containing the MoS

quantum dots. The results show that the quantum dot size distribution is uniform and the particle size is about 2.4 nm. The E

and A

Raman characteristic peaks of the MoS

material were observed at 381 cm

-1

and 406 cm

-1

in the Raman spectrum. It was found that the presence of MoS

quantum dots caused a significant change in the absorbance spectra around 260-400 nm

and the emission wavelength of MoS

quantum dots in the mixed solvent seriously depended on the excitation wavelength. The results of dialysis experiments with water as the external environment show that the HOMO level of DCB solvent will cause multiple emission peaks in the luminescence of MoS

quantum dots near 442 nm

but the emission wavelength will no longer change with the excitation wavelength

indicating the dependence of the luminescence of MoS

quantum dots on the excitation wavelength is due to the luminescence of the organic solvent under ultraviolet excitation.

关键词

Keywords

references

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Related Institution

Center of Excellence for Environmental Safety and Biological Effects， Beijing Key Laboratory for Green Catalysis and Separation， College of Environmental Science and Engineering， College of Chemistry and Life Sciences， Beijing University of Technology

Key Laboratory of Functional Materials Physics and Chemistry of Ministry of Education， Jilin Normal University

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Solvent-dependent Optical Properties of MoS2 Quantum Dots

DOI：10.3788/fgxb20194011.1359

摘要

Abstract

关键词

Keywords

references

Solvent-dependent Optical Properties of MoS₂ Quantum Dots