A series of novel red emission phosphors Sr₃Lu_1‐x(VO₄)₃:xEu³⁺(x = 0.007, 0.009, 0.02, 0.04, 0.06) were synthesized successfully by traditional high‐temperature solid‐state reaction. The results of X‐ray diffraction (XRD) reveal the doped Eu³⁺ ions have replaced the lattice sites of Lu³⁺ ions. The diffuse reflectance spectra illustrate the energy gap of Sr₃Lu(VO₄)₃ host is 3.61 eV. The room‐temperature steady‐state fluorescence spectra show that these phosphors can be effectively pumped by the charge‐transfer band (CTB) of the host in near ultraviolet (NUV) spectral region and then produce strong and pure red emission at 615 nm originated from ⁵D₀ → ⁷F₂ electric dipole transition of Eu³⁺. The Commission Internationale de L’Eclairage (CIE) coordinates of Sr₃Lu_0.96(VO₄)₃:0.04Eu³⁺ are (x = 0.65, y = 0.35), which are very close to the red standard of National Television Standards Committee NTSC (0.67, 0.33). The fabricated warm white‐light‐emitting diodes (LED) demonstrate high color‐rendering index Ra as 93. The results imply the red‐emitting Sr₃Lu(VO₄)₃:Eu³⁺ phosphors could be potentially utilized in the fields of solid‐state lighting.

中文翻译：

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Sr3Lu（VO4）3：用于暖白光LED的Eu3 +红色发光磷光体

通过传统的高温固态反应成功合成了一系列新型的红色荧光粉Sr ₃ Lu _{1- x}（VO ₄）₃：x Eu ³⁺（x  =  0.007，0.009，0.02，0.04，0.06）。X射线衍射（XRD）结果表明，掺杂的Eu ³⁺离子已取代Lu ³⁺离子的晶格位。漫反射光谱说明了Sr ₃ Lu（VO ₄）₃的能隙主机为3.61 eV。室温稳态荧光光谱显示，这些磷光体可被宿主的电荷转移带（CTB）在近紫外（NUV）光谱区域有效泵浦，然后在615 nm处产生强烈而纯净的红色发射，其起源于Eu ^3+的5 D ₀  →  ⁷ F ₂电偶极跃迁。国际照明委员会（CIE）的Sr ₃ Lu _0.96（VO ₄）₃：0.04Eu ³⁺坐标（x = 0.65，y = 0.35），非常接近国家电视标准委员会NTSC的红色标准（0.67，0.33）。制成的暖白光发光二极管（LED）的高显色指数Ra为93。结果表明，发红光的Sr ₃ Lu（VO ₄）₃：Eu ³⁺磷光体可潜在地用于以下领域：固态照明。