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溶剂依赖的MoS2量子点光学性质
Solvent-dependent Optical Properties of MoS2 Quantum Dots
- 发光学报 2019年40卷第11期 页码：1359-1364
- 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：教育部"111"创新引智项目（D17017）;国家自然科学基金（21703017，11604024）;武器装备预研基金重点项目（6140414020102）;吉林省科技发展计划（20180519017JH）;吉林省国际科技合作项目（20190701029GH）;吉林省教育厅项目（JJKH20190551KJ，JJKH20181101KJ，JJKH20181106KJ）;中国博士后科学基金（2019M651181）;长春理工大学青年基金及科技创新基金（XQNJJ-2018-03，XJJLG-2018-01）资助项目
DOI：10.3788/fgxb20194011.1359
中图分类号： O469收稿日期：2019-06-21，
修回日期：2019-07-16，
网络出版日期：2019-07-26，
纸质出版日期：2019-11-05
- 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
2
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
2
量子点，并采用透析的方法对照研究了溶剂及含有MoS
2
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
2
材料的E
2g
1
和A
1g
拉曼特征峰。光学性质分析表明，MoS
2
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
2
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
2
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
2
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
2
quantum dots
MoS
2
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
2
quantum dots. The results show that the quantum dot size distribution is uniform and the particle size is about 2.4 nm. The E
2g
1
and A
1g
Raman characteristic peaks of the MoS
2
material were observed at 381 cm
-1
and 406 cm
-1
in the Raman spectrum. It was found that the presence of MoS
2
quantum dots caused a significant change in the absorbance spectra around 260-400 nm
and the emission wavelength of MoS
2
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
2
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
2
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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