Abstract The single-component Dy3+ activated Ba3Bi2(PO4)4 white light emitting phosphors were prepared by solid state reaction method. The phase formation of these phosphors was characterized by powder X-ray diffraction (PXRD) patterns. The photoluminescence properties and the surface morphology of these phosphors were investigated. The excitation spectrum of the Dy3+ characteristic emission at 575 nm exhibited narrow bands in the 300–450 nm range. Exciting the Ba3Bi2-x(PO4)4:xDy3+ x = 0.03, 0.06, 0.09, 0.12, 0.15, 0.18(here after abbreviated as BaBiPO:Dy3+) phosphor with 349 nm (near UV), the emission bands were observed at 470 nm (blue), 575 nm (yellow) and 664 nm (red) corresponding to the transitions (4F9/2 → 6H15/2), (4F9/2 → 6H13/2), and (4F9/2 → 6H11/2) respectively. The phosphor with x = 0.09 Dy3+ ion showed the maximum luminescence intensity. The luminescence lifetime of these phosphors were found to be in the millisecond range. The temperature dependent luminescence of BaBiPO:0.09Dy3+ phosphor for 349 nm excitation was investigated and the calculated activation energy, ΔE, was 0.262 eV. The quantum efficiency and the colour rendering index were calculated. In addition, the Commission International del'Eclairagethe (CIE) chromaticity coordinates of these phosphors were found to be located in the near white region (x = 0.329, y = 0.349). These results indicate that the BaBiPO:Dy3+ phosphor has great potential as a single-component white-light-emitting phosphor for near-UV excitation.

中文翻译：

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用于白光发光二极管的 Ba3Bi2 (PO4)4:Dy3+ 荧光粉的合成和光学性能

摘要 采用固态反应法制备了单组分Dy3+活化的Ba3Bi2(PO4)4白光荧光粉。这些磷光体的相形成由粉末 X 射线衍射 (PXRD) 图案表征。研究了这些磷光体的光致发光特性和表面形态。Dy3+ 特征发射在 575 nm 处的激发光谱在 300-450 nm 范围内表现出窄带。激发 Ba3Bi2-x(PO4)4:xDy3+ x = 0.03, 0.06, 0.09, 0.12, 0.15, 0.18（以下简称 BaBiPO:Dy3+）荧光粉，在 349 nm（近紫外）处观察到发射带在 470 nm （蓝色）、575 nm（黄色）和 664 nm（红色）分别对应于跃迁 (4F9/2 → 6H15/2)、(4F9/2 → 6H13/2) 和 (4F9/2 → 6H11/2) . x = 0 的荧光粉。09 Dy3+ 离子显示出最大的发光强度。发现这些磷光体的发光寿命在毫秒范围内。研究了 BaBiPO:0.09Dy3+ 荧光粉在 349 nm 激发下的温度依赖性发光，计算的活化能 ΔE 为 0.262 eV。计算量子效率和显色指数。此外，发现这些荧光粉的国际委员会 (CIE) 色度坐标位于近白色区域 (x = 0.329, y = 0.349)。这些结果表明 BaBiPO:Dy3+ 磷光体作为用于近紫外激发的单组分白光发射磷光体具有巨大的潜力。研究了用于 349 nm 激发的 09Dy3+ 磷光体，计算出的活化能 ΔE 为 0.262 eV。计算量子效率和显色指数。此外，发现这些荧光粉的国际委员会 (CIE) 色度坐标位于近白色区域 (x = 0.329, y = 0.349)。这些结果表明 BaBiPO:Dy3+ 磷光体作为用于近紫外激发的单组分白光发射磷光体具有巨大的潜力。研究了用于 349 nm 激发的 09Dy3+ 磷光体，计算出的活化能 ΔE 为 0.262 eV。计算量子效率和显色指数。此外，发现这些荧光粉的国际委员会 (CIE) 色度坐标位于近白色区域 (x = 0.329, y = 0.349)。这些结果表明 BaBiPO:Dy3+ 磷光体作为用于近紫外激发的单组分白光发射磷光体具有巨大的潜力。发现这些磷光体的 Eclairagethe (CIE) 色度坐标位于近白色区域 (x = 0.329, y = 0.349)。这些结果表明 BaBiPO:Dy3+ 磷光体作为用于近紫外激发的单组分白光发射磷光体具有巨大的潜力。发现这些磷光体的 Eclairagethe (CIE) 色度坐标位于近白色区域 (x = 0.329, y = 0.349)。这些结果表明 BaBiPO:Dy3+ 磷光体作为用于近紫外激发的单组分白光发射磷光体具有巨大的潜力。