期刊
DALTON TRANSACTIONS
卷 39, 期 47, 页码 11432-11438出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0dt00709a
关键词
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资金
- National Natural Science Foundation of China [20771035]
- Hi-Tech Research and Development Program of China [2006AA03Z3592]
- Innovation Scientists and Technicians Troop Construction Projects of Henan Province
- New Century Excellent Talents in University
Here we report a low-cost and green phosphine-free route for the size-and shape-controlled synthesis of high-quality zinc blende (cubic) ZnSe nanocrystals. To avoid the use of expensive and toxic solvents such as trioctylphosphine (TOP) or tributylphosphine (TBP), SeO2 was dispersed in 1-octadecene (ODE) as a chalcogen precursor. It has been found that the temperature and the surface ligand influenced the nucleation, the reaction speed and the formation of different shapes. Absorption spectroscopy, fluorescence spectroscopy, powder X-ray diffraction (XRD) and transmission electron microscopy (TEM) were used for the characterization of the as-synthesized ZnSe nanocrystals. The size-dependent photoluminescence (PL) range of the as-prepared ZnSe nanocrystals was between 390 and 450 nm, with the PL full width at half-maximum (FWHM) well controlled between 14 and 18 nm and PL quantum yields reached up to 40% at room temperature. Moreover, this new selenium precursor can be used to form tetrapod-shaped ZnSe nanocrystals when zinc acetylacetonate was introduced as the zinc precursor with a one-pot method.
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