ENHANCING 1540 NM LIGHT EMISSION FROM ERBIUM DOPED STRONTIUM SUBSTITUTED HYDROXYAPATITE/BETA-TRICALCIUM PHOSPHATE

Abstract

This paper presents a method for synthesizing erbium (Er) doped strontium (Sr) substituted hydroxyapatite (HA)/hydroxyapatite/beta-tricalcium phosphate (TCP) nanostructures to achieve strong and stable near-infrared light emission at approximately 1540 nm. The Er-doped Sr-HA/TCP exhibited a rod-like structure by optimizing the concentrations of strontium and erbium and the annealing temperatures. The photoluminescence (PL) intensity of the sample increased with higher Sr and Er concentrations. The PL spectra of the nanoparticles displayed the characteristic luminescence of Er³⁺ centered at 1540 nm, which was more efficient in the annealed Er- doped Sr-HA/TCP compared to the annealed Er-doped HA/TCP nanoparticles. These findings indicate the potential of using Sr as a sensitizing material for synthesizing of Er-doped Sr-HA/TCP with strong 1540 nm light emission, suitable for applications in waveguide telecommunication and biomedicine.