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

被引：0
|
作者：
Yu Zhang
Quanqin Dai
Xinbi Li
Qingzhou Cui
Zhiyong Gu
Bo Zou
Yiding Wang
William W Yu
机构：
[1] Jilin University,State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering
[2] Worcester Polytechnic Institute,Department of Chemistry and Biochemistry
[3] University of Massachusetts Lowell,Department of Chemistry Engineering
[4] Jilin University,State Key Laboratory of Superhard Materials
来源：
Nanoscale Research Letters | / 5卷
关键词：
PbSe; CdSe; Core–shell; Near infrared; Emission; Nanocrystals;
D O I：
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学科分类号：
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.
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