Large-Scale Synthesis of InPZnS Alloy Quantum Dots with Dodecanethiol as a Composition Controller

被引：77

作者：

Kim, Taehoon ^{[1
]}

Kim, Sung Woo ^{[1
]}

Kang, Meejae ^{[1
]}

Kim, Sang-Wook ^{[1
]}

机构：

[1] Ajou Univ, Dept Mol Sci & Technol, Suwon 443749, South Korea

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2012年 / 3卷 / 02期

基金：

新加坡国家研究基金会;

关键词：

LIGHT-EMITTING-DIODES; HIGH-QUALITY INP; SEMICONDUCTOR NANOCRYSTALS; CDSE; ELECTROLUMINESCENCE;

D O I：

10.1021/jz201605d

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：

A method for the large-scale synthesis of InPZnS alloy QDs was developed, which tune the optical properties by controlling the dodecanethiol to palmitic acid ratio. The control of the surfactant ratio resulted in the change of alloy composition. The absorption and emission peaks showed a blue shift as the amount of DDT increased, which implied the increase of ZnS contents. The alloy structure was confirmed with TEM, elemental analysis, XRD, and XPS; particularly, P-2p peaks for In-P and InP-S bonds in XPS analysis could give clear evidence. The alloy QDs were overcoated with a ZnS shell, and the quantum yields (QYs) were in the range of 20-45% for all wavelengths. Finally, a cadmium-free QD yield in a single reaction was determined to be 2.74 g.

引用

页码：214 / 218

页数：5

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