A series of phosphors Eu³⁺-activated Sr₂Nb₂O₇ red emitting phosphors were synthesized using a solid-state method in high temperature air. The X-ray diffraction (XRD) pattern showed that the single phase was obtained and the particles illustrated a narrow size distribution of about 0.75 μm. The excitation and emission spectrum show that the phosphor can be excited under the light of 393 nm or 465 nm to emit strong red light of 615 nm. The CIE coordinates (x = 0.65, y = 0.37) of the representative red phosphor are close to pure red. The luminescence properties suggest the phosphor is a potential red emitting phosphor.

中文翻译：

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用于白色LED的潜在发红光磷光体Sr _2-x Nb ₂ O ₇：xEu ^3+的合成和光致发光特性

使用固态方法在高温空气中合成了一系列荧光粉Eu ³⁺活化的Sr ₂ Nb ₂ O ₇发光红色荧光粉。X射线衍射（XRD）图谱显示获得单相，并且颗粒显示出约0.75μm的窄尺寸分布。激发和发射光谱表明，磷光体可以在393nm或465nm的光下激发以发射615nm的强红光。代表性红色荧光粉的CIE坐标（x = 0.65，y = 0.37）接近纯红色。发光性质表明该磷光体是潜在的发红光的磷光体。