Plasma electrochemical synthesis of silicon quantum dots

被引：2

作者：

Ma, Yupengxue ^{[1
]}

Wang, Ruoyu ^{[1
]}

Qin, Xiaoru ^{[1
]}

Zhang, Qing ^{[1
]}

Zhong, Xiaoxia ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Phys & Astron, State Key Lab Adv Opt Commun Syst & Networks, Key Lab Laser Plasmas,Minist Educ, Shanghai 200240, Peoples R China

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2023年 / 56卷 / 47期

基金：

中国国家自然科学基金; 上海市自然科学基金; 中国博士后科学基金;

关键词：

silicon quantum dots; plasma; photoluminescence; quantum yield; LIGHT-EMITTING-DIODES; NANOCRYSTALS; STABILITY;

D O I：

10.1088/1361-6463/acf0ce

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Environmentally friendly and fast synthesis of silicon quantum dots (SiQDs) is realized with the assistance of plasma. The precursors used are N-(ss-aminoethyl)-.-aminopropyl trimethoxysilane (DAMO) and citric acid. When the excitation wavelength was 370 nm, the photoluminescence emission peak of the SiQDs appeared at 452.5 nm. The optimization of precursor concentration, reaction time and other parameters can effectively improve the quantum yield (QY) of SiQDs. The results show that the amidation and condensation of DAMO and citric acid plays an important role in the improvement of QY, as this means that more fluorescent molecules are produced and therefore QY is increased. This paper increases QY from 4.23% to 23.9%, providing a promising way to improve QY even more.

引用

页数：8

共 37 条

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