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

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

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 attribut...

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Veröffentlicht in:Nanoscale research letters 2010-06, Vol.5 (8), p.1279-1283
Hauptverfasser: Zhang, Yu, Dai, Quanqin, Li, Xinbi, Cui, Qingzhou, Gu, Zhiyong, Zou, Bo, Wang, Yiding, Yu, William W
Format: Artikel
Sprache:eng
Schlagworte:
CdSe
Core-shell
Emission
Nanocrystals
Near infrared
PbSe
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Zusammenfassung: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.
ISSN:1931-7573
1556-276X
1556-276X
DOI:10.1186/1556-276X-5-1279