A Study of Electron Paramagnetic Resonance on Copper Ions on Alkali-Alkali Earth Zinc Phosphate Glass

Abstract

42%P 2 O 5 -40%ZnO-2%CaO-(16-x) %Na 2 O-xCu 2 O glass system (x=o, 2, 4, 6, 8, 10%mol) were prepared by conventional melt-quenching technique. It was investigated by means of electron paramagnetic resonance (EPR) to study the structural changes induced by different amount of copper ions. The spin Hamiltonian parameters like g∥ , g⊥ and A∥ show that Cu +2 ionare in tetrahedral coordination with d xy as the ground state. Modification of EPR band width by increasing copper content suggests that band consists of two overlapping bands; one of them is related to asymmetric band due to isolated copper ions and the other is symmetric due to cluster ions Cu +2 -Cu +2 . Calculation of the optical basicity indicates to that polarizability decrease by increasing copper content due to increase electron cloud density at the Cu 2+ site.

Cadmium Doped Copper Containing Phosphate Glass as a Bandpass Filter for Solar Cell Protection

“…Particular attention has been paid to the copper doped phosphate glasses because of their semiconducting properties, interesting optical transmission/absorption spectrum and relatively low glass transformation temperature [14]. CuO can greatly modify the absorption behavior of phosphate glass because it has two optical absorption bands at the ultraviolet and visible-near infrared regions of spectrum, i.e.…”