Abstract This paper reports the structural and optical properties of novel Ba3Bi2(BO3)4:Eu3+ red-emitting phosphor. Concentration series of Ba3Bi2(BO3)4:Eu3+ powders were prepared using crystallization from a melt. Powder X-ray diffraction data confirmed formation of single phase samples. Distribution of Eu3+ ions over three cation sites were refined for Ba3(Bi1-xEuх)2(BO3)4 solid solutions (x = 0.05, 0.35 and 0.8) from single-crystal XRD data. Emission and excitation spectra of Eu3+-doped Ba3Bi2(BO3)4 phosphors show characteristic lines attributed to the intraconfigurational 4f-4f transitions. The optimal Eu3+ doping concentration in Ba3Bi2(BO3)4 host was found to be 50 at.%, whereas concentration quenching phenomenon occurred through dipole-dipole interaction. 5D0 lifetime slightly changed with increase of doping concentration, showing average value of 1.64 ms. The CIE chromaticity coordinates of Ba3Bi2(BO3)4:Eu3+ 50 at.% phosphor was determined to be (0.65, 0.35) which is close to the NTSC standard values (0.67, 0.33) for potential red phosphors. The obtained results show that the Ba3Bi2(BO3)4:Eu3+ phosphors are promising candidates for solid state lighting application.

中文翻译：

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一种用于固态照明应用的新型热稳定 Ba3Bi2(BO3)4:Eu3+ 红色荧光粉

摘要 本文报道了新型 Ba3Bi2(BO3)4:Eu3+ 红色荧光粉的结构和光学特性。Ba3Bi2(BO3)4:Eu3+ 粉末的浓度系列是通过熔体结晶制备的。粉末 X 射线衍射数据证实了单相样品的形成。对于 Ba3(Bi1-xEuх)2(BO3)4 固溶体（x = 0.05、0.35 和 0.8），Eu3+ 离子在三个阳离子位点上的分布通过单晶 XRD 数据进行了细化。Eu3+ 掺杂的 Ba3Bi2(BO3)4 荧光粉的发射和激发光谱显示出归因于构型内 4f-4f 跃迁的特征线。发现 Ba3Bi2(BO3)4 主体中的最佳 Eu3+ 掺杂浓度为 50 at.%，而浓度猝灭现象是通过偶极-偶极相互作用发生的。5D0 寿命随着掺杂浓度的增加而略有变化，显示平均值为 1.64 毫秒。Ba3Bi2(BO3)4:Eu3+ 50 at.% 磷光体的 CIE 色度坐标被确定为 (0.65, 0.35)，接近潜在红色磷光体的 NTSC 标准值 (0.67, 0.33)。获得的结果表明 Ba3Bi2(BO3)4:Eu3+ 荧光粉是固态照明应用的有希望的候选者。