Electron Paramagnetic Resonance and Optical Absorption Studies of Cu2+ Ion-doped ZnAlBiB GlassesElectron Paramagnetic Resonance and Optical Absorption Studies of Cu2+ Ion-doped...K. Chandrika et al.

被引：0

作者：

K. Chandrika ^{[1
]}

G. Snegitha ^{[1
]}

M. Venkateswarlu ^{[1
]}

M. V. V. K. Srinivas Prasad ^{[1
]}

G. G. Dhar ^{[2
]}

S. K. Mahamuda ^{[1
]}

K. Swapna ^{[1
]}

A. S. Rao ^{[3
]}

机构：

[1] Koneru Lakshmaiah Education Foundation,Department of Physics

[2] Acharya Nagarjuna University,Department of Nanotechnology

[3] Delhi Technological University,Department of Applied Physics

来源：

Journal of Electronic Materials | 2025年 / 54卷 / 4期

关键词：

Electron paramagnetic resonance; spin-Hamiltonian; bandgap; Urbach energy; optical basicity;

D O I：

10.1007/s11664-024-11647-z

中图分类号：

学科分类号：

摘要：

Zinc alumino bismuth borate (ZnAlBiB) glasses enriched with various concentrations of Cu2+ ions were investigated using electron paramagnetic resonance (EPR) and optical absorption spectroscopy. The EPR spectra of all the glasses show a characteristic resonance, confirming the presence of Cu2+ ions within the glass matrices. The prepared glasses contained Cu2+ ions arranged in an octahedral coordination with tetragonal distortion, as evidenced by the spin-Hamiltonian parameters obtained from the EPR spectrum analysis. It was observed that the g⊥ value increased as the concentration of copper ions increased. The optical absorption spectra displayed a single broad band characteristic of Cu2+ ions for all the prepared samples. The molecular orbital parameters were determined by comparing the EPR and optical absorption spectral data to understand the type of bonding present in these glasses. The optical bandgap energy (Eopt) and Urbach energy (E) were calculated for all ZnAlBiB glasses at the ultraviolet edges. The optical bandgap energy decreased as the concentration of copper ions increased, while the Urbach energy increased.

引用

页码：3252 / 3259

页数：7