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Zns Nanocrystal Synthesis Essay

Highly monodisperse zinc blende CdSe have been synthesized by using different -free Se precursors successfully. To understand the reaction mechanism and obtain high quality CdSe , the effects on the use of different Se and/or Cd precursors, the adjustment of the molar ratios between Cd and Se precursors, and the selection of suitable reaction and growth temperatures have been studied in details. , , (), and () were used for the characterization of synthesized CdSe . The quality of as-prepared CdSe was reached the same high level compared with the method using phosphine selenium precursors, its quantum yields were among 30 to 60% and photoluminescence (PL) full width at half-maximum (FWHM) was well controlled between 22 and 28 nm. As core, such zinc blende CdSe were also used to synthesize CdSe/ZnS, CdSe/CdS, and CdSe/CdS/ZnS core-shell . The quantum yields of as-prepared core-shell were among 50 to 80%. Large-scale syntheses of such core-shell have been successfully demonstrated and as many as 3 g of high quality CdSe/ZnS were easily synthesized with the use of only low-cost, green, and environmentally friendlier reagents.

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