Red Emitting Sr₂CeO₄: 2.0 mol % Eu³⁺ Phosphor for the Application of Solid State Lighting

The phosphor Sr₂CeO₄: 2.0 mol% Eu³⁺ was synthesized by solid state reaction method and their luminescent characteristics were studied. The samples were characterized by XRD, FTIR, and Photoluminescence. The X-Ray diffraction patterns reveal the crystallite size of powder. The emission color can be changed by tuning activator's concentration in Sr₂CeO₄:Eu³⁺ phosphor. The doped compound emits strong red light when the concentration of the doped Eu³⁺ was 2.0 mol %. A broad excitation band ascribed to the Ce⁴⁺- O^2-transition was observed and under the excitation at ultraviolet region, the intense red emission peaks were originated from the f-f transition of Eu³⁺. The color co-ordinates of Sr₂CeO₄ were x = 0.6809 and y = 0.3189 and CIE coordinates revealed that the present phosphor may be used in solid state lighting applications.