A series of intense red-emission phosphors, Y₃Mg₂Nb₃O₁₄:Eu³⁺, with higher color purity were prepared via the conventional high-temperature ceramic route. The influence of Mg²⁺ ion incorporation in the highly symmetrical YNbO₄ lattice on the luminescence properties was studied using powder x-ray diffraction, scanning electron microscopy with energy dispersive spectrometry, UV–visible absorption spectroscopy, and photoluminescence measurements. The developed phosphors crystallize into a monoclinic fergusonite-type structure with a C2/c space group even with the addition of Mg into the system. These phosphors display intense, sharp, red emission with a maximum at 613 nm under near-UV excitation. The photoluminescence studies suggest that Mg addition perturbs the A site network forming cation pairs of Eu³⁺-Y³⁺, Eu³⁺-Mg²⁺, and Eu³⁺-Eu³⁺ connected with O²⁻ ions. The preferential occupation of cations in the A site network by the incorporation of Mg²⁺ ions in the YNbO₄ host lattice induces Eu³⁺-Eu³⁺ separation and results in intense, sharp, red emission due to increased radiative probabilities. Moreover, the color purity of the Y_3−xMg₂Nb₃O₁₄:xEu³⁺ phosphor could achieve 92.4% that is attributed to the narrow full width at half maximum (FWHM ∼ 4 nm) of the red emission peaking at 613 nm. More importantly, the luminescence intensity of the developed phosphor is 9.4 times greater than that of the Philip’s red phosphor under near-UV excitation. Because of the intriguing red luminescence, phosphors exhibit Commission Internationale de l’Elcairage color coordinates (0.63, 0.35) close to the National Television System Committee standards, low correlated color temperature values for warm white lighting, and greater color purity (92.4%) for improving the color rendering index, which makes them a potential candidate for use in the fabrication of white light-emitting diodes.

通过常规的高温陶瓷工艺制备了一系列色纯度更高的强红色发光磷光体Y ₃ Mg ₂ Nb ₃ O ₁₄：Eu ³⁺。Mg ²⁺离子掺入对高度对称YNbO _4的影响使用粉末X射线衍射，具有能量色散光谱的扫描电子显微镜，紫外可见吸收光谱和光致发光测量研究了晶格对发光性能的影响。即使向系统中添加了Mg，开发出的磷光体也会结晶成具有C2 / c空间基团的单斜镁铝辉石型结构。这些荧光粉在近紫外光激发下显示出强烈，尖锐的红色发射光，最大发射波长为613 nm。光致发光研究表明，Mg的添加会扰乱A位网络，形成与O ²⁻连接的Eu ³⁺ -Y ³⁺，Eu ³⁺ -Mg ²⁺和Eu ³⁺ -Eu ^3+的阳离子对。离子。通过在YNbO ₄主体晶格中掺入Mg ²⁺离子，A位点网络中的阳离子优先占据，引起Eu ³⁺ -Eu ³⁺分离，并由于辐射概率的增加而导致强烈的，尖锐的红色发射。另外，Y _{3− x} Mg ₂ Nb ₃ O ₁₄：x Eu ³⁺的色纯度磷光体可达到92.4％，这归因于在613 nm处出现红色发射峰的半高全宽（FWHM〜4 nm）。更重要的是，在近紫外光激发下，显影后的荧光粉的发光强度是菲利普红色荧光粉的9.4倍。由于引人入胜的红色发光，磷光体的国际色彩委员会的色坐标（0.63，0.35）接近国家电视系统委员会的标准，暖白光的相关色温值较低，而色温较高的色纯度（92.4％）改善了显色指数，使其成为制造白色发光二极管的潜在候选者。