Effect of pH on Structure and Green Emission of Er/Yb/Mo Tri-doped Hydroxyapatite

This paper reported the impact of pH on structure, morphology, and green upconversion (UC) emission Er/Yb/Mo tri-doped hydroxyapatite (HA) synthesized through hydrothermal method. X-ray diffraction confirmed that solution strongly influenced phase composition phosphors, HA single was obtained at a high value. Transmission electron microscopy (TEM) high-resolution transmission (HRTEM) images phosphor exhibited rod-like their length increased with values. Under laser-diode excitation wavelength 975 nm, showed typical bands ion: strong around 510-535/540-560 nm weak red 630-680 nm. The intensity as function reached its maximum value pH8. Finally,