X‐Ray Luminescence, Photoluminescence, and Radiation Shielding Properties of Europium‐Doped Oxide Glasses for Red Light‐Emitting Device Applications
R. Rajaramakrishna, W. Chaiphaksa, Garima, Sharvani Kolar Nagesha, S. Kothan, J. Kaewkhao
Abstract
This study is focused on bringing significance to the X‐ray luminescence, photoluminescence, and radiation shielding properties of Eu 3+ ions doped oxide glasses. X‐ray luminescence spectra show signature emission peaks at 579, 590, 613, 645, and 700 nm corresponding from 5 D 0 to 7 F 0, 1,2,3,4 . The asymmetry ratio decreases with an increase in Eu 3+ concentration. X‐ray luminescence shows the highest and broad emission at 613 nm followed by 700 nm. Judd–Ofelt (J–O) analyses are employed to understand the oscillator strength and to obtain radiative properties. Thermal corrections are instigated using the J–O theory. The phonon sideband analysis is studied and it is found that the prepared glasses show phonon energy around 1384 cm −1 . Radiative properties are employed using J–O parameters. The quantum efficiency for 1 mol% Eu 2 O 3 content is 60.57%. Structural analysis is employed using a Fourier transform infra‐red study and it is found that the glasses show signature B–O vibrations in BO 3 and BO 4 units. The CIE 2015 color coordinate, delta UV, and color correlated temperature values are evaluated. Radiation shielding properties such as mass attenuation coefficient, total attenuation coefficient, effective atomic number, and electron density are calculated. Higher radiation shielding values are observed for the Eu 2 O 3 doped glasses compared to undoped glasses.