Dy3+ -doped CaAl12 O19 phosphors were synthesized utilizing a combustion method. Crystal structure and morphological examinations were performed respectively using X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques to identify the phase and morphology of the synthesized samples. Fourier transform infrared spectroscopy (FTIR) estimations were carried out using the KBr method. Photoluminescence properties (excitation and emission) were recorded at room temperature. CaAl12 O19 :Dy3+ phosphor showed two emission peaks respectively under a 350-nm excitation wavelength, centered at 477 nm and 573 nm. Dipole-dipole interaction via nonradiative energy shifting has been considered as the major cause of concentration quenching when Dy3+ concentration was more than 3 mol%. The CIE chromaticity coordinates positioned at (0.3185, 0.3580) for the CaAl12 O19 :0.03Dy3+ phosphor had a correlated color temperature (CCT) of 6057 K, which is situated in the cool white area. Existing results point out that the CaAl12 O19 :0.03Dy3+ phosphor could be a favorable candidate for use in white light-emitting diodes (WLEDs).

中文翻译：

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white掺杂CaAl12 O19荧光粉用于白色发光二极管的发光特性研究。

利用燃烧方法合成了Dy3 +掺杂的CaAl12 O19荧光粉。分别使用X射线衍射（XRD）和扫描电子显微镜（SEM）技术进行晶体结构和形态学检查，以鉴定合成样品的相和形态。使用KBr方法进行了傅里叶变换红外光谱（FTIR）估计。在室温下记录光致发光性质（激发和发射）。CaAl12 O19：Dy3 +荧光粉分别在350 nm激发波长下以477 nm和573 nm为中心显示两个发射峰。当Dy3 +的浓度大于3 mol％时，通过非辐射能移动引起的偶极-偶极相互作用被认为是浓度猝灭的主要原因。CIE色度坐标位于（0.3185，0。CaAl12 O19：0.03Dy3 +磷光体的3580）的相关色温（CCT）为6057 K，位于较冷的白色区域。现有结果指出，CaAl12 O19：0.03Dy3 +磷光体可能是用于白色发光二极管（WLED）的理想候选材料。