Abstract A series of red-emitting Sm3+/Eu3+ co-doped Ba3Bi(PO4)3 (BBP) phosphors were successfully synthesized through a high temperature solid-state reaction. Luminescence spectroscopic properties and decay kinetics of the samples were studied, revealing an energy transfer from Sm3+ to Eu3+ realized via electric dipole-dipole interaction in Sm3+/Eu3+ couple. The energy transfer efficiency was found to grow with the increase of Eu3+ content while no obvious concentration quenching of Eu3+ emission was detected up to the concentration of 25 %. The phosphor revealed a good thermal stability owing to relatively high activation energy of 0.21 eV deduced. Color coordinates and color purity of BBP:0.05Sm3+, 0.25Eu3+ phosphor were obtained to be (0.624, 0.374) and 88.9 %, respectively. The absorption of Eu3+ within the near ultraviolet spectral range was found to constantly enhance due to energy transfer from Sm3+. The results imply Sm3+/Eu3+ co-doped BBP has a great potential as a narrow-band red light-emitting phosphor applied in WLEDs.

中文翻译：

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基于 Sm3+ 和 Eu3+ 共掺杂 Ba3Bi(PO4)3 的高色纯度红光荧光粉

摘要 通过高温固相反应成功合成了一系列发红光的Sm3+/Eu3+共掺杂Ba3Bi(PO4)3(BBP)荧光粉。研究了样品的发光光谱特性和衰变动力学，揭示了通过 Sm3+/Eu3+ 电偶极-偶极相互作用实现从 Sm3+ 到 Eu3+ 的能量转移。发现能量转移效率随着 Eu3+ 含量的增加而增加，而当浓度达到 25% 时，未检测到明显的 Eu3+ 发射浓度猝灭。由于推导出的 0.21 eV 的较高活化能，荧光粉显示出良好的热稳定性。BBP:0.05Sm3+、0.25Eu3+荧光粉的色坐标和色纯度分别为(0.624,0.374)和88.9%。发现 Eu3+ 在近紫外光谱范围内的吸收由于来自 Sm3+ 的能量转移而不断增强。结果表明 Sm3+/Eu3+ 共掺杂 BBP 作为窄带红色发光荧光粉应用于 WLED 具有巨大的潜力。