In this study, we successfully synthesized europium-doped TiO2(TiO2:Eu3+) nanomaterials (NMs) with crystalline
sizes ranging from 6.5 to 71.7 nm through a sol-gel method. Analysis of X-ray diffraction (XRD) patterns and
ultraviolet-visible (UV-Vis) spectra indicates that the substitution of smaller-sized Ti4+ ions (0.745 Å) by largersized Eu3+ ions (0.947 Å) was more efficient at higher doping concentrations and annealing temperatures.
Photoluminescence (PL) and photoluminescence excitation (PLE) spectra of the synthesized TiO2:7%Eu3+
NMs exhibit a strong red emission band peaking at 613 nm and remarkable absorption in the blue light region
centered at 463 nm, making them suitable for use in white light-emitting diode (WLED) applications. Our
findings reveal that both annealing temperature and doping concentration significantly influence the structure
and properties of these materials. Besides, the research team has seen, under the experimental conditions,
the TiO2:7%Eu3+ sample annealed at 800°C exhibits the highest PL intensity. These results underscore the
potential of the synthesized TiO2:Eu3+ NMs as red-emitting materials for WLED application