Synthesis and photoluminescence properties of double perovskite structure Ba2YNbO6:Sm3+ phosphors

This study successfully synthesized Ba₂YNbO₆:Sm³⁺ phosphor using the high-energy vibrating mill solid-state reaction method at 1250 °C for 6 h in air. The results of X-ray diffraction (XRD) analysis showed that the Sm³⁺ ion-doped Ba₂YNbO₆ phosphor possesses a cubic crystal structure without the formation of any secondary phases. Under excitation at a wavelength of 284 nm, four emission peaks were observed at 550–585 nm, 602–636 nm, 651–682 nm, and 713–752 nm, corresponding to the characteristic 4f-4f electronic transitions of Sm³⁺ ions. The emission intensity reached its maximum when the Sm³⁺ ion concentration was 2 mol%, beyond which concentration quenching occurred. The measured decay time was 2.6 ms, and the calculated critical distance (Rc) was 21.249 Å, indicating that the primary interaction mechanism among Sm³⁺ ions is dipole-dipole interaction within multipolar interactions. With increasing Sm³⁺ doping concentration, the CIE chromaticity coordinates shifted from the light blue region to the orange-red region. This study demonstrates the structural stability and optical properties of Ba₂YNbO₆:Sm³⁺ phosphors. By tuning the Sm³⁺ ion doping concentration, the emission color can be adjusted, highlighting the potential application of this material in optical technologies.