In this work, we synthesized and characterized a narrow band red emitting Gd₃Zn₂Nb₃O₁₄:Eu³⁺ phosphor in order to improve the color qualities of warm white light emitting diodes. The phosphors were synthesized via conventional solid state reaction method and investigated the evolution of emission spectra with partial occupation of Zn²⁺ ions on both A and B site of the fergusonite type structure. The structural and luminescence property analysis corroborates the occupancy of Eu³⁺ ions in the Gd³⁺/Zn²⁺ ion site (A site). The developed phosphor exhibits a strong red emission peaking at 613 nm with a fwhm of merely ∼3.50 nm under the 392 nm excitation. These compounds produce narrow emissions in the visible red spectral regions that are highly professed by human eye and lead to outstanding chromatic saturation of the red spectra. The enhanced electric dipole transition intensity arises from the symmetry distortion of Eu³⁺ ions caused by the introduction of Zn²⁺ ions in the lattice. The distortion of the A site symmetry and the red shift of the charge transfer energy leads to an intense ⁵D₀ – ⁷F₂ hypersensitive electric dipole transition under 392 nm excitation. The relative emission intensity was found to be maximum at x = 0.40 and is 3.9 times higher than that of the commercial red phosphor under the 392 nm excitation. These phosphors with remarkable CIE chromaticity coordinates (0.64, 0.35), good CCT values along with high color purity (94.2%) might have significant applications in display devices and evidence as an efficient red phosphor.

在这项工作中，我们合成并表征了窄带红色发射Gd ₃ Zn ₂ Nb ₃ O ₁₄：Eu ³⁺荧光粉，以改善暖白色发光二极管的颜色质量。通过常规的固态反应方法合成了磷光体，并研究了在洋红铁矿型结构的A和B位上Zn ²⁺离子被部分占据的发射光谱的演化。结构和发光特性分析证实了Gd ³⁺ / Zn ²⁺中Eu ³⁺离子的占有率离子位点（一个位点）。显影后的荧光粉在392 nm激发下在613 nm处显示出很强的红色发射峰，其fwhm仅为〜3.50 nm。这些化合物在人眼高度认可的可见红色光谱区域中产生窄发射，并导致红色光谱显着的色饱和度。电偶极跃迁强度的提高是由于在晶格中引入Zn ²⁺离子引起的Eu ³⁺离子的对称畸变。A位对称性的畸变和电荷转移能量的红移会导致强烈的⁵ D ₀ – ⁷ F _2。392 nm激发下的超灵敏电偶极跃迁。发现相对发射强度在x  = 0.40时最大，并且在392 nm激发下比商用红色磷光体高3.9倍。这些具有显着的CIE色度坐标（0.64，0.35），良好的CCT值以及高的色纯度（94.2％）的荧光粉可能在显示设备中具有重要的应用，并被证明是一种有效的红色荧光粉。