Gd₂InSbO₇:Eu³⁺ red phosphors were successfully synthesized via high-temperature solid–state reaction. The phase purity, particle size, and luminescence properties of obtained phosphors were measured and analyzed in detail. The Gd₂InSbO₇ lattice possesses cubic structure with F_d-3m (227) space group. The phosphors emit bright red emission at 628 nm under 393 nm excitation, and this phenomenon is attributed to the ⁵D₀–⁷F₂ transition. The Judd–Ofelt parameters (Ω₂, Ω₄), transition ratio, and branching ratios (β) of Eu³⁺-doped Gd₂InSbO₇ phosphor were calculated on the basis of the emission spectra and decay lifetimes. The optimal content in Gd₂InSbO₇:xEu³⁺ is identified to be 15 mol%. The thermal quenching of Gd₂InSbO₇:Eu³⁺ is found to be over 500 K, and its activation energy is 0.26 eV. The Commission Internationale de l'Eclairage (CIE) chromaticity coordinates of Gd₂InSbO₇:15%Eu³⁺ are (0.629, 0.371), which are close to ideal red chromaticity coordinates (0.670, 0.330). The fabricated w-LED exhibits good color rendering index (R_a) (86), correlated color temperature (CCT) (6997 K), and CIE chromaticity coordinates (0.302, 0.330). The obtained results demonstrate that Gd₂InSbO₇:Eu³⁺ phosphors have potential applications in white LEDs.

Gd ₂ InSbO ₇ :Eu ³⁺红色荧光粉通过高温固相反应成功合成。对所得荧光粉的相纯度、粒径和发光性能进行了详细测量和分析。Gd ₂ InSbO ₇晶格具有立方结构，具有F _{d- 3 m} (227) 空间群。荧光粉在 393 nm 激发下发出 628 nm 的亮红色发射，这种现象归因于⁵ D ₀ – ⁷ F ₂跃迁。Judd–Ofelt 参数 ( Ω ₂ , Ω ₄)、Eu ³⁺掺杂的Gd ₂ InSbO ₇磷光体的跃迁比和分支比( β )基于发射光谱和衰变寿命计算。Gd ₂ InSbO ₇ : x Eu ^{3+ 中}的最佳含量被确定为15 mol%。发现Gd ₂ InSbO ₇ :Eu ³⁺的热猝灭超过500 K，其活化能为0.26 eV。Gd ₂ InSbO ₇ :15%Eu ^{3+ 的}The Commission Internationale de l'Eclairage (CIE) 色度坐标是 (0.629, 0.371)，接近理想的红色色度坐标 (0.670, 0.330)。制造的 w-LED 表现出良好的显色指数 ( R _a ) (86)、相关色温 (CCT) (6997 K) 和 CIE 色度坐标 (0.302, 0.330)。所得结果表明Gd ₂ InSbO ₇ :Eu ³⁺荧光粉在白光LED中具有潜在的应用。