【摘要】 采用水热-退火两步工艺制备系列Y₂O₃∶xEu³⁺红色荧光粉，并研究Eu³⁺掺杂不同浓度对晶体结构和发光性能的影响.X射线衍射结果表明，样品均为立方相Y₂O₃,无杂相生成，Eu³⁺的引入导致晶格常数增大，表明其成功进入Y₂O₃晶格；荧光光谱表明，样品于611 nm处呈现最强红光发射，对应于Eu³⁺的⁵D₀→⁷F₂跃迁，随Eu³⁺掺杂浓度的增加，发光强度先增强后降低，当Eu³⁺掺杂摩尔分数为3%时，发射强度达到最大值，继续增加掺杂浓度则引发浓度猝灭现象；CIE色坐标表明，样品色坐标均在红光范围内，3%Eu³⁺掺杂样品色坐标最接近标准红光（0.64, 0.33）,表现出优异的色纯度。更多还原

【Abstract】 A series of Y₂O₃∶xEu³⁺ red phosphors were prepared via a two-step hydrothermal-annealing method. The influence of Eu³⁺ doping concentration on their crystal structure and luminescent performance was systematically studied. X-ray diffraction（XRD） results indicate that all samples possess a pure cubic Y₂O₃ phase without impurity phases, and the increased lattice constant confirms the successful incorporation of Eu³⁺ into the Y₂O₃ lattice. Photoluminescence（PL） spectra show that all samples emit the strongest red light at 611 nm, corresponding to the ⁵D₀→⁷F₂ transition of Eu³⁺. With the increase of Eu³⁺ doping concentration, the emission intensity first increases and then decreases, reaching the maximum at a molar fraction of 3%, beyond which concentration quenching occurs. CIE chromaticity coordinates show that all samples are in the red light region, and the sample with 3% Eu³⁺ has chromaticity coordinates closest to the standard red light（0.64, 0.33）, showing excellent color purity.更多还原