Synthesis and Characterization of Luminescent Er³⁺-Doped Natural Fluorapatite

Ca 10 (PO 4 ) 6 F 2 :xEr 3+ (x = 0.1, 0.3 and 0.5) was synthesized using solid-state powder process (1150 °C, 1h), conventional sintering spark plasma (SPS) techniques min, 50 MPa). XRD analysis revealed that all samples are generally composed of fluorapatite (FAP) containing quartz as a minor phase, the presence Er O 3 peaks is becoming more evident Er-doped increases. In SEM microstructure images, non-diffused particles also increase with doping in pellet samples. However, PL showed luminescence intensity did not proportionally content caused by concentration quenching effect. FAP doped mol have higher than 0.1 0.5 addition, highest due to increased increasing crystallite size. The characteristic H 11/2 I 15/2 emission bands at ∼530 nm seen maximum average lifetime obtained 125 μ s sample Er. CIE color coordinates demonstrate standard green under ∼ 275 excitation; eventually, these phosphors can be utilized for optical applications.