Size- and shape-controlled synthesis of ZnSe nanocrystals using SeO2 as selenium precursor

作者：Shen, Huaibin; Niu, Jin Zhong; Wang, Hongzhe; Li, Xiaomin; Li, Lin Song^*; Chen, Xia

来源：Dalton Transactions, 2010, 39(47): 11432-11438.

DOI：10.1039/c0dt00709a

• SEMICONDUCTOR NANOCRYSTALS
• QUANTUM DOTS
• SOLAR-CELLS
• CDSE
• EMITTERS
• EFFICIENT
• LABELS

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.

• 出版日期2010
• 单位吉林大学; 河南大学