Synthesis of trap emission free cadmium sulfide quantum dots: Role of phosphonic acids and halide ions

被引：16

作者：

Arora, Vikas ^{[1
]}

Soni, Udit ^{[1
]}

Mittal, Mona ^{[1
]}

Yadav, Sushma ^{[1
]}

Sapra, Sameer ^{[1
]}

机构：

[1] Indian Inst Technol Delhi, Dept Chem, New Delhi, India

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2017年 / 491卷

关键词：

CdS; Nanocrystals; Surface states; Phosphonic acid; SEMICONDUCTOR NANOCRYSTALS; PHOTOLUMINESCENCE ENHANCEMENT; CDSE NANOCRYSTALS; SURFACE; GROWTH; LUMINESCENCE; DYNAMICS; WURTZITE; SHAPE;

D O I：

10.1016/j.jcis.2016.12.049

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：

Changing the capping ligands of CdS nanocrystals during their synthesis controls the optical properties of these nanocrystals. Addition of a little amount of CdCl2:Phosphonic Acid (PA) completely eliminates the surface state emission with an increase in quantum yield of band edge emission from these nanocrystals. The role of halide ions in surface passivation along with the structural dependance of these nanocrystals on surface states has also been studied. These as prepared nanocrystals are uniform as well as monodispersed and their size can be tuned by varying the reaction time. These nanocrystals have been well characterized using a combination of optical and structural techniques. (C) 2016 Elsevier Inc. All rights reserved.

引用

页码：329 / 335

页数：7

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