As one of the important raw materials for LED products, phosphors play an important role. At present, the spectrum of LED phosphors lacks red light, resulting in poor quality of white LED products and a low color rendering index (Ra <80), which affects lighting effects. To solve this problem, we synthesized the SrGd₂O₄:Eu³⁺ red phosphor by a high-temperature solid-phase method. The structure and luminescence properties of SrGd₂O₄:Eu³⁺ red phosphors were studied by means of X-ray diffraction (XRD) measurements of their emission and excitation spectra, and their spectra were analyzed. We also studied the Eu³⁺ doping concentration with the best luminous efficiency and the color coordinate of the SrGd₂O₄:Eu³⁺ phosphor. The experimental results show that SrGd₂O₄:Eu³⁺ is a new red phosphor material that can be used for near-ultraviolet or blue-light excitation and has good practicability.

中文翻译：

---

SrGd2O4：Eu3 +红色荧光粉的合成及发光性能

作为LED产品的重要原材料之一，磷光体起着重要的作用。目前，LED荧光粉的光谱缺少红光，导致白色LED产品的质量较差，并且显色指数较低（Ra <80），这会影响照明效果。为了解决该问题，我们通过高温固相法合成了SrGd ₂ O ₄：Eu ³⁺红色荧光粉。通过X射线衍射（XRD）测量了SrGd ₂ O ₄：Eu ³⁺红色荧光粉的结构和发光性能，并对其光谱进行了分析。我们还研究了Eu ³⁺SrGd ₂ O ₄：Eu ³⁺荧光粉的最佳发光效率和色坐标的掺杂浓度。实验结果表明，SrGd ₂ O ₄：Eu ³⁺是一种新型的红色荧光粉材料，可用于近紫外或蓝光激发，具有良好的实用性。