Green Light Emission from Tb3+ ion doped Boro-Tellurite Glass Potential for Scintillation and Thermoluminescence Material Application

Rare-earth doped glasses have gained significant attention due to their potential applications in photonic devices, including scintillators and thermoluminescence dosimeters (TLD). Among these, terbium (Tb3+) ion is known for their strong green luminescence, making them valuable for optical and radiation detection technologies. The combination of TeO2 and other glass modifiers enhances the optical and structural properties of the host matrix, making it suitable for doping with rare-earth ions. The primary goal of this study is to synthesize and characterize a series of Tb3+ doped tellurite-based glasses with varying concentrations of terbium oxide (Tb2O3) for scintillation and thermoluminescence material application. Glasses with the molar composition (30-x) TeO2: 20B2O3: 20MgO: 10Li2O: 10Al2O3: 10La2O3: xTb2O3 (x is 0.0, 1.0, 2.0, 3.0, 4.0 and 5.0 mol%) were produced using a conventional melt-quenching approach. X-ray diffraction analysis confirmed that the glass was amorphous. In addition, the UV-VIS-NIR spectrometer recorded the absorption spectra of a number of peak values. As the concentrations of Tb3+ increase, both the radioluminescence (RL) and photoluminescence (PL) results increase. The glass samples exhibited strong luminescence spectra with prominent emission bands at 545 nm, corresponding to the characteristic transitions of Tb3+ ion. The highest luminescence efficiency of Tb3+ ion was observed at a concentration of 4 mol%. In the prepared glasses, the RL and PL obtained from different concentrations of Tb3+ ion is almost close to the green light region, as shown in the CIE 1931 chromaticity diagram. Furthermore, the thermoluminescence (TL) parameters were calculated using Chen is peak shape method, such as activation energy (E) and frequency factor (S). The developed glasses show promise for use in Scintillation and TLD.