Abstract
Ce4+, Eu3+, Tb3+ co-doped Ca3Si3O8F2 phosphor was synthesized via solid state reaction method using CaF2, CaCO3 and SiO2 as raw materials for the host and Eu2O3, CeO2, and Tb4O7 as activators. The luminescent properties of the phosphor was analysed by spectrofluorophotometer at room temperature. The effect of excitation wavelengths on the luminescent properties of the phosphor i.e. under near-ultraviolet (nUV) and visible excitations was investigated. The emission peaks of Ce4+, Eu3+, Tb3+ co-doped Ca3Si3O8F2 phosphor lays at 480(blue band), 550(green band) and 611nm (red band) under 380nm excitation wavelength, attributed to the Ce4+ ion, Tb3+ ion and Eu3+ ions respectively. The results reveal that the phosphor emits white light upon nUV (380nm) / visible (465nm) illumination, and a red light upon 395nm / 535nm illumination. RE ions doped Ca3Si3O8F2 is a promising white light phosphor for LEDs. The emission colours can be seen using Commission international de l
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