Synthesis, Structural, and Photoluminescence Studies of Tb3+ Activated Y2SiO5 Phosphor for Display Devices

The synthesis and luminescence analysis of Tb 3+ -activated phosphors were reported. Y 2 SiO 5 phosphors were synthesized by a modified solid-state reaction method with a variable doping concentration of Tb 3+ ion (0.5–2.5 mol.%). As synthesized, the phosphors were characterized by X-ray diffraction (XRD) analysis. The XRD pattern confirmed the monoclinic structure of the prepared phosphor. Scanning electron microscopy and High-Resolution Transmission Electron Microscopy (HRTEM) studies revealed nearly uniform particle size distribution in the prepared phosphors. The photoluminescence excitation spectra of the Y 2 SiO 5 :Tb 3+ (0.5–2.5 mol.%) phosphor displayed one broad, intense peak at 258–277 nm. When excited at the 258 nm wavelength, the phosphors showed emission peaks at 553 nm ( 5 D 4 → 7 F 5 ), 544 nm ( 5 D 4 → 7 F 5 ) and 489 nm ( 5 D 4 → 7 F 6 ). The 1931 CIE ( x , y ) chromaticity coordinates showed the distribution of the spectral region calculated from the photoluminescence emission spectra. The values of x = 0.25 and y = 0.46 were very close to light green emission. Therefore, the prepared phosphor is very useful for light-emitting diode (green component) applications.