Synthesis and optical study of green light emitting polymer coated CdSe/ZnSe core/shell nanocrystals

CdSe/ZnSe Core/Shell NCs dispersed in PVA are synthesized by chemical method at room temperature. This is characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), UV/Vis spectra and photoluminescence spectroscopy (PL). TEM image shows the spherical nature of CdSe/ZnSe core/shell NCs. The red shift of absorption and emission peak of CdSe/ZnSe core/shell NCs as compared to CdSe core confirmed the formation of core/shell. The superposition of quantum confinement energy model is used for calculation of thickness of ZnSe shell.

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► Synthesis of Polymer coated core CdSe and CdSe/ZnSe core/shell NCs.
► From TEM image, the spherical nature of CdSe and CdSe/ZnSe is obtained.
► Exhibiting green band photoemission peak at 541 nm and 549 nm for CdSe core and CdSe/ZnSe core/shell NCs.
► The shell thickness has been calculated by using superposition of quantum confinement energy model.