| 用于宽谱带发射白色发光二极管的黄色荧光粉Sr8MgAl(PO4)7∶xEu2+的制备及发光性能 | |
| Synthesis and Luminescence Properties of Broadband Emitting Yellow Phosphor Sr8MgAl(PO4)7:xEu2+ for White Light-Emitting Diode | |
| 摘要: 通过高温固相反应合成了一系列宽谱带发射黄色荧光粉Sr8MgAl（PO4）7∶xEu2+（SMAP∶xEu2+），并对其物质结构、发光性能及其在白色发光二极管（WLED）领域的应用进行了探究。X射线衍射（XRD）测试结果表明，SMAP∶xEu2+系列荧光粉具有单斜结构和C2/m空间群，激活剂Eu2+离子能够很好地进入SMAP基质中并占据Sr2+离子的晶格位点。漫反射光谱分析显示SMAP基质属于宽带隙材料，带隙宽度为3.60 eV。此外，SMAP∶xEu2+具有较宽的激发范围（280~500 nm），对应于Eu2+离子的4f7→4f65d1跃迁；在380 nm近紫外光激发下，呈现出450~800 nm的多发光中心的非对称黄光发射，发射峰位于590 nm处。基于高斯多峰拟合结果，得到3个发光中心，分别位于528、600和680 nm。最后，将已制备的黄色荧光粉SMAP∶0.05Eu2+与商业化蓝粉BaMgAl10O17∶Eu2+混合涂覆到400 nm芯片上制得色温较好（3 344 K）、显色指数较高（90.1）的WLED。 | |
| 关键词: 宽谱带发射 Sr8MgAl (PO4)7 黄光荧光粉 白光发光二极管 近紫外激发 高显色指数 | |
| 基金项目: 国家自然科学基金（No.51702147）资助。 | |
| Abstract: In this study, a series of broadband emitting yellow phosphors Sr8MgAl(PO4)7:xEu2+ (SMAP:xEu2+) were synthesized by high temperature solid-state reaction; and the structure, luminescent properties and potential application in white light-emitting diode (WLED) were investigated. The X-ray diffraction (XRD) results showed that the SMAP:xEu2+ phosphors had monoclinic system and C2/m space group; and the activator Eu2+ ions can enter into the SMAP matrix and occupy the lattice site of Sr2+ ions. Diffuse reflectance spectroscopy showed that SMAP host was a wide band-gap material with a band gap of 3.60 eV. In addition, SMAP:xEu2+ had a broad excitation range (280~ 500 nm), corresponding to the 4f7→4f65d1 transition of Eu2+ ions. Under the excitation of 380 nm near-ultraviolet light, there was an asymmetric yellow emission at the wavelength of 450~800 nm from multiple emission centers; and the emission peak was located at 590 nm. Based on Gaussian multi-peak fitting results, three emission centers were located at 528, 600 and 680 nm, respectively. Finally, the as-prepared yellow phosphor SMAP:0.05Eu2+ and commercial blue phosphor BaMgAl10O17:Eu2+ were mixed and coated on the surface of 400 nm chip to fabricate WLED with good color temperature (3 344 K) and high color rendering index (90.1). | |
| Keywords: broadband emission Sr8MgAl(PO4)7 yellow phosphor white light-emitting diode near ultraviolet excitation high color rendering index | |
| 投稿时间：2021-02-15 修订日期：2021-05-08 | |
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| 周江聪,陈梦婷,赖亦晴,时晨,吴德武,吴泉生.用于宽谱带发射白色发光二极管的黄色荧光粉Sr8MgAl(PO4)7∶xEu2+的制备及发光性能[J].无机化学学报,2021,37(7):1237-1244. | |
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