Abstract
YVO(4) based phosphors have aroused extensive interest in the field of optoelectronics due to their good chemical stability and unique luminescence properties. However, commercialization of YVO(4) phosphors requires high luminescence intensity, enhanced conversion efficiency, and a wide excitation spectrum. In this work, Eu(3+), Ba(2+), Bi(3+) co-doped YVO(4) was prepared by the sol-gel method. The XRD of YVO(4): 5%Eu(3+), 5%Ba(2+), 0.5%Bi(3+) phosphor analysis confirms the pure tetragonal phase, with a fairly large size of approximately 100 nm for the optimal composition. And the SEM and TEM revealed well-dispersed spherical nanoparticles with sizes of 100-120 nm. The introduction of Ba(2+) ions enhanced the luminescence intensity, while the incorporation of Bi(3+) ions improved the excitation width of the phosphor. The resulting YVO(4): 5%Eu(3+), 5%Ba(2+), 0.5%Bi(3+) phosphor exhibited a 1.39-times broader excitation bandwidth and a 2.72-times greater luminescence intensity at 618 nm compared to the benchmark YVO(4): 5% Eu(3+) sample. Additionally, the transmittance of the films in the 350 nm to 800 nm region exceeded 85%. The YVO(4): 5%Eu(3+), 5%Ba(2+), 0.5%Bi(3+) film effectively absorbed ultraviolet light and converted it to red emission, enabling potential applications in solar cell window layers, dye-sensitized cell luminescence layers, and solar cell packaging glass.