Shell-thickness dependent optical properties of CdSe/CdS core/shell nanocrystals coated with thiol ligands

被引：42

作者：

Lin, Wanzhen ^{[1
]}

Niu, Yuan ^{[1
]}

Meng, Renyang ^{[1
]}

Huang, Lin ^{[1
]}

Cao, Hujia ^{[1
]}

Zhang, Zhenxing ^{[1
]}

Qin, Haiyan ^{[1
]}

Peng, Xiaogang ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Chem, Ctr Chem Novel & High Performance Mat, Hangzhou 310027, Zhejiang, Peoples R China

来源：

NANO RESEARCH | 2016年 / 9卷 / 01期

基金：

中国国家自然科学基金;

关键词：

colloidal semiconductor nanocrystals; thiol ligands; photoluminescence quantum yield; single-dot spectroscopy; CADMIUM SELENIDE NANOCRYSTALS; COLLOIDAL QUANTUM DOTS; LIGHT-EMITTING-DIODES; HOLE TRANSFER; SUPPRESSED BLINKING; PHOTOLUMINESCENCE; LUMINESCENCE; NONBLINKING; CHEMISTRY; DYNAMICS;

D O I：

10.1007/s12274-016-1014-0

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：

Using CdSe/CdS core/shell nanocrystals with 1-10 monolayers of CdS shell as the model system, we studied effects of thiol ligands on optical properties of the nanocrystals. The core/shell nanocrystals with original ligands possessed near unity photoluminescence (PL) quantum yield and single-exponential PL decay dynamics. The effects of thiol ligands on optical properties were found to depend on the shell thickness, environment (with/without oxygen), and excitation power (single-or multi-exciton). Systematic and quantitative results reported in this work should provide necessary information for fundamental understanding and technical applications of quantum dots (QDs) coated with thiol ligands.

引用

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页码：260 / 271

页数：12

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