Preparation and Luminescence Properties of Red Phosphor Y<sub>2</sub>O<sub>3</sub>: Eu<sup>3+</sup>

In this study, red phosphor Y₂O₃:0.1%Eu³⁺ was prepared by the high temperature solid phase method, the effects of sintering temperature and holding time on the phase structure, morphology and luminescence properties of the phosphor were investigated. XRD, SEM, UV-VIS spectrophotometer and fluorescence spectrophotometer were used to analyze the phase, micromorphology, absorption and luminescence spectra of the samples. The results show that the phosphors have a single <italic>c</italic>-Y₂O₃ phase at different sintering temperatures and holding times, Eu³⁺ enters Y₂O₃ lattice as an activator, occupying the C₂ and S₆ sites. As the sintering temperature increase, the grain size increases by approximately 4 times, and the light intensity increases by about 40 times. In addition, Y₂O₃:0.1%Eu³⁺ phosphor can be effectively excited at 190 nm~300 nm, which is attributed to the charge transfer transition band (CTB) of O^2--Eu³⁺. It exhibits a strong red emission at 610 nm, which is formed by the ⁵D₀→⁷D₂ electric dipole transition of Eu³⁺, where Eu³⁺ is in the C₂ asymmetric central lattice. The phosphor prepared at 1100 ℃ for 3 h has uniform size, regular morphology and excellent luminescence performance, which has excellent luminescence performance and is a more ideal.