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The CdSe quantum dots(QDs) were synthesized with water phase Se precursor and non-toxic glycerol as a solvent of Cd precursor. According to the analysis by X-ray diffraction(XRD), the phases of the product are pure. The particle size of the monodispersive QDs product determined by high resolution transmission electron microscopy(HRTEM) is 3.2 nm~4.5 nm. Furthermore, compared to the CdSe bulk material, the band gap of QDs exhibits a blue shift, indicating that the size of the QDs product is in nanoscale. In addition, the photoluminescent spectra of CdSe QDs show red shifts from 529 nm to 591 nm when the size of CdSe QDs increases, due to the quantum size effect. The quantum yield of CdSe QDs is calculated to be 50.53%, which is greater than that of the CdSe QDs synthesized by other water phase methods.
The CdSe quantum dots (QDs) were synthesized with water phase Se precursor and non-toxic glycerol as a solvent of Cd precursor. According to the analysis by X-ray diffraction (XRD), the phases of the product are pure. The particle size of the monodispersive QDs product determined by high resolution transmission electron microscopy (HRTEM) is 3.2 nm to 4.5 nm. Furthermore, compared to the CdSe bulk material, the band gap of QDs exhibits a blue shift, indicating that the size of the QDs product is In addition, the photoluminescent spectra of CdSe QDs show red shifts from 529 nm to 591 nm when the CdSe QDs increase, due to the quantum size effect. The quantum yield of CdSe QDs is calculated to be 50.53%, which is greater than that of the CdSe QDs synthesized by other water phase methods.