Sr9Mg1.5(PO4)7:Eu2+: A Novel Broadband Orange-Yellow-Emitting Phosphor for Blue Light-Excited Warm White LEDs
Sr9Mg1.5(PO4)7:Eu2+: A Novel Broadband Orange-Yellow-Emitting Phosphor for Blue Light-Excited Warm White LEDs
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Sr9Mg1.5(PO4)(7):Eu2：一种用于蓝光激发暖白光 LED 的新型宽带橙黄色荧光粉
DOI：
10.1021/acsami.5b06961
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发表时间：
2015-11-18
影响因子：
9.5
通讯作者：
Li, Chengyu
中科院分区：
文献类型：
--
作者：
Sun, Wenzhi;Jia, Yonglei;Li, Chengyu
采用高温固相反应法制备了一种新型的橙黄发光材料Sr9 Mg 1. 5（PO 4）（7）：Eu 2+。系统地研究了其结构和光学性质。Sr9Mg1.5（PO 4）（7）：Eu 2+被460 nm的蓝色InGaN芯片很好地激发，在470 ~ 850 nm范围内具有两个主峰，分别位于523 nm和620 nm处，这两个主峰来源于Eu 2+在不同晶位的5d-4f偶极跃迁。详细研究了配合物的位置归属、浓度猝灭、荧光衰减分析和温度依赖性发光性质。此外，通过将460 nm蓝色InGaN芯片与优化的橙黄发光Sr9 Mg 1. 5（PO 4）（7）：Eu 2+组合，制备了暖白色LED器件。所制备的LED器件的色坐标、相关色温和显色指数分别为（0.393，0.352）、3437 K和86.07。Sr9Mg1.5（PO 4）（7）：Eu 2+在蓝光激发的暖白色LED中具有很好的应用前景。
A new orange-yellow-emitting Sr9Mg1.5(PO4)(7):Eu2+ phosphor was prepared via high-temperature solid-state reaction. The structure and optical properties of it were studied systematically. Sr9Mg1.5(PO4)(7):Eu2+ can be well-excited by 460 nm blue InGaN chips and exhibit a wide emission band covering from 470 to 850 nm with two main peaks centered at 523 and 620 nm, respectively, which originate from 5d-4f dipole-allowed transitions of Eu2+ in different crystallographic sites. The sites attribution, concentration quenching, fluorescence decay analysis, and temperature-dependent luminescence properties were investigated in detail. Furthermore, a warm white LED device was fabricated by combining a 460 nm blue InGaN chip with the optimized orange-yellow-emitting Sr9Mg1.5(PO4)(7):Eu2+. The color coordinate, correlated color temperature and color rendering index of the fabricated LED device were (0.393, 0.352), 3437 K, and 86.07, respectively. Sr9Mg1.5(PO4)(7):Eu2+ has great potential to serve as an attractive candidate in the application of blue light-excited warm white LEDs.