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

被引：44
|
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
收藏
页码：260 / 271
页数：12
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