Theoretical and experimental Investigation of Structural, electronic and optical properties of neodymium doped ZnO

Abstract

The morphological and cathodoluminescent properties of Nd doped zinc oxide thin films deposited by reactive chemical pulverization spray pyrolysis technique on heated glass substrates at 450 °C are being reported. The films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and cathodoluminescent (CL) spectroscopy. We have also used the Generalised Gradient Approximation (GGA)-the Self Interaction Corrected (SIC) to determine Electronic structure and x ray absorption.

Effect of Nd3+ Doping on Structural, Near-Infrared, and Cathodoluminescent Properties for Cadmium Tantalate Phosphors

“…On the other hand, the undoped sample has the highest host emission intensity, while the intrinsic emission intensity of Nd 3+ doped samples at 450 nm decreases with increasing concentration. This is due to the inclusion of Nd 3+ ion in the lattice affected the crystallinity (45). As seen from the CL spectra, 10 mol% Nd 3+ doped phosphor has lowest intrinsic emission intensity, which can be attributed to the fact that Nd 3+ doping causes the most distortion (or the highest effect on crystallization) at this concentration.…”

“…As seen from the CL spectra, 10 mol% Nd 3+ doped phosphor has lowest intrinsic emission intensity, which can be attributed to the fact that Nd 3+ doping causes the most distortion (or the highest effect on crystallization) at this concentration. The emission peak of Nd 3+ doped phosphors at about 670 nm (red emission) show a red emission which is associated with the defect related to deep emission (45,46), the recombination of electrons in the non-bridging oxygen band-gap state with holes in the valence band edge (47,48). The final luminescence peak of 900 nm indicates neodymium emission from the 4f shell transition of Nd 3+ ions corresponding to the ground state (4I 9/2 ) from the excited state (4F 3/2 ) in the host lattice (49).…”