Abstract
Ni, Zn co-doped CdSe quantum dots (QDs) were synthesized by chemical precipitation method through aqueous route. The prepared QDs were characterized by X-ray diffraction (XRD) technique, UV–Vis absorption spectroscopy, photoluminescence (PL) spectroscopy and high resolution transmission electron microscopy (HRTEM). XRD technique results indicate that the prepared samples have a zinc blende cubic phase. From UV–Vis absorption spectroscopy technique, the prepared samples were blue shifted with respect to their bulk counter part due to quantum confinement effect. Among different doping ratios examined, a maximum PL emission intensity was observed for CdSe:Ni(1 %):Zn(1 %) QDs. HRTEM pictures show that the prepared QDs were in spherical shape.
Highlights
In recent years, synthesis and characterization of II–VI semiconductor materials at nano scale has attracted the research community, due to their great potential to examineIn the present work, the Ni, Zn co-doped CdSe quantum dots (QDs) were synthesized at moderate temperatures using water as a solvent
The prepared QDs were characterized by X-ray diffraction (XRD) technique, UV–Vis absorption spectroscopy, photoluminescence (PL) spectroscopy and high resolution transmission electron microscopy (HRTEM)
The Ni, Zn co-doped CdSe QDs were synthesized by simple chemical precipitation method via aqueous medium
Summary
Synthesis and characterization of II–VI semiconductor materials at nano scale has attracted the research community, due to their great potential to examine. The Ni, Zn co-doped CdSe QDs were synthesized at moderate temperatures using water as a solvent. The structural, optical and morphological properties of the co-doped CdSe QDs were analyzed and discussed. The photoluminescence study reveals that the actual Ni, Zn co-doping concentrations for CdSe QDs enhance the luminescence property
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