PHOTOLUMINESCENCE PROPERTIES OF TB3+ DOPED ON PHOSPHATE GLASS MEDIUM BY ADDITION OF FLUORIDE COMPOUNDS

Abstract

 Research has been conducted on the effect of the addition of fluoride compounds on the photoluminescence properties of Tb³⁺ doped on phosphate glass has been found. with the composition of glass samples are 69 P₂O₅ - 20 LiO₂ - 10 AlF₃ - 1Tb₂O₃ (P-Tb1), 59 P₂O₅ - 20 LiO₂ - 10 AlF₃ - 10 NaF - 1 Tb₂O₃ (P-Tb2) and 49 P₂O₅ - 20 LiO₂ - 10 AlF₃ - 10 NaF -10KF - 1 Tb₂O₃ (P-Tb3). All chemical compounds are in powder form with a total mass of 15 grams using the melt-qunching technique at 1100⁰C. To determine the quality of the material, measurements and calculations were made of physical properties including molar mass, density, molar volume, refractive index, Tb³⁺ ion concentration, Polaron radius, molar refractivity, reflection loss and dielectric constant. Characterizations carried out include FTIR, UV-VIS-NIR Spectrophotometer, Abbe Refractometer, Spectrofluorophotometer. To study the physical properties, the optical properties were examined through their absorption and luminescence spectra. The luminescence spectrum is known by photoluminescence. Characteristic luminescence bands corresponding to electronic transitions of terbium ions were detected under two direct excitations of Tb³⁺ ions. After 377 nm excitation, the glass sample obtained terbium ⁵D₄→ ⁷F₅ transition at 544 nm indicating green laser. The application of green laser has been investigated with CIE coordinate diagram.