Formation of PbSe/CdSe Core/Shell Nanocrystals for Stable Near-Infrared High Photoluminescence Emission

被引：53

作者：

Zhang, Yu ^{[1
,2
]}

Dai, Quanqin ^{[1
]}

Li, Xinbi ^{[2
]}

Cui, Qingzhou ^{[3
]}

Gu, Zhiyong ^{[3
]}

Zou, Bo ^{[4
]}

Wang, Yiding ^{[1
]}

Yu, William W. ^{[1
,2
]}

机构：

[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China

[2] Worcester Polytech Inst, Dept Chem & Biochem, Worcester, MA 01609 USA

[3] Univ Massachusetts Lowell, Dept Chem Engn, Lowell, MA 01854 USA

[4] Jilin Univ, State Key Lab Superhard Mat, Changchun 130012, Peoples R China

来源：

NANOSCALE RESEARCH LETTERS | 2010年 / 5卷 / 08期

关键词：

PbSe; CdSe; Core-shell; Near infrared; Emission; Nanocrystals; PBSE SEMICONDUCTOR NANOCRYSTALS; QUANTUM DOTS; COLLOIDAL PBSE; EXTINCTION COEFFICIENT; CDSE; GAP;

D O I：

10.1007/s11671-010-9637-7

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

PbSe/CdSe core/shell nanocrystals with quantum yield of 70% were obtained by the "successive ion layer adsorption and reaction" technology in solution. The thickness of the CdSe shell was exactly controlled. A series of spectral red shifts with the CdSe shell growth were observed, which was attributed to the combined effect of the surface polarization and the expansion of carriers' wavefunctions. The stability of PbSe nanocrystals was tremendously improved with CdSe shells.

引用

页码：1279 / 1283

页数：5

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