Abstract A series of Sm3+-doped KPb4(PO4)3 phosphors have been successfully synthesized by high-temperature solid-state reaction method, and the structure, morphology and luminescent properties were investigated. The SEM images suggest that the prepared phosphor has an irregular morphology with a diameter of about 10 ~ 20 μm. Under near-ultraviolet (NUV) light (404 nm) excitation, all prepared phosphors KPb4-xSmxP3O12 (x = 0, 0.02, 0.04, 0.06, 0.08, 0.1, 0.15, 0.2, 0.3, 0.4 and 0.5) show the characteristic f → f emission bands of the Sm3+ activator. And the emission intensities have an upward trend with increasing the Sm3+ concentration when x is lower than 0.1. By monitoring 598 nm emission, the excitation spectrum of KPb3.9Sm0.1(PO4)3 contains a series of sharp bands in the range of 250 ~ 500 nm, which matches well with the NUV LED chip. The CIE coordinates of KPb3.9Sm0.1(PO4)3 phosphor was evaluated to be (0.5714, 0.4253), corresponding to orange color with a high color purity of about 90%.

中文翻译：

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LED 用 Sm3+ 激活的 KPb4 (PO4)3 荧光粉的合成和光致发光性能

摘要 采用高温固相反应法成功合成了一系列Sm3+掺杂的KPb4(PO4)3荧光粉，并对其结构、形貌和发光性能进行了研究。SEM图像表明制备的荧光粉具有直径约10~20μm的不规则形态。在近紫外 (NUV) 光 (404 nm) 激发下，所有制备的荧光粉 KPb4-xSmxP3O12 (x = 0, 0.02, 0.04, 0.06, 0.08, 0.1, 0.15, 0.2, 0.3, 0.4 和 f) 均表现出特性 → 0.5 f Sm3+ 活化剂的发射带。当x小于0.1时，发射强度随着Sm3+浓度的增加而呈上升趋势。通过监测598 nm发射，KPb3.9Sm0.1(PO4)3的激发光谱在250~500 nm范围内包含一系列尖锐的带，与NUV LED芯片匹配良好。