The Photoluminescent and Magnetic Properties of Mn2+ Ions at the Interface of Core/Shell Mn-Doped Nanocrystals

Abstract

The properties of Mn-doped Nanocrystals (NCs) with increasing binding symmetry and ZnSe:Mn/ ZnSe NCs under different temperatures were investigated to demonstrate the relation between the strength of crystal field and covalency. The position of Mn ions in NCs were accurately controlled at the interface of the core/shell Mn-doped NCs. Transmission Electron Microscopy (TEM) images and X-ray Diffraction (XRD) spectra were used to demonstrate the structure of the NCs. Magnetic properties of the NCs were gained through the Electron Paramagnetic Resonance (EPR) spectra. Photo Luminescent (PL) properties reflect the strength of crystal filed in Mn-doped NCs and the magnetic properties demonstrate the change of covalency. The relationship between the crystal field and covalency was indicated by structure-dependent and temperature-dependent properties of Mn-doped NCs.