利用XRD、VUV及UV光谱等方法对Ce3+、Tb3+离子掺杂以及Ce3+、Tb3+离子共掺的3种BaCa2(BO3)2荧光粉的相纯度、发光性质、浓度猝灭现象进行研究。结果表明: 3种荧光粉在VUV波段有较好的吸收, 基质吸收带位于140～190 nm范围。Ce3+在BaCa2(BO3)2的最低4f5d跃迁带位置在360 nm附近, 其5d→2FJ(J=5/2, 7/2)发射峰分别位于393, 424 nm。Tb3+掺杂的样品在172 nm激发下的发射光谱由4个窄带组成, 分别对应5D4→7FJ(J=3, 4, 5, 6)的跃迁, 其中占主导位置的是5D4→7F5的跃迁, 大约位于543 nm处, 主要为绿光发射。在Ce3+, Tb3+离子共掺杂的BaCa2(BO3)2光谱中, 观察到Ce3+-Tb3+离子间有能量传递。

The luminescence properties of Ce3+, Tb3+ activated BaCa2(BO3)2 phosphors were investigated by vacuum-ultraviolet (VUV) and ultraviolet(UV) spectra. The phase purity was characterized by the powder x-ray diffraction (XRD). The results demonstrate that the band near 140～190 nm range in the VUV excitation spectra is ascribed to the host-related absorption. The lowest 5d state of Ce3+ in BaCa2(BO3)2 is located at 360 nm, and two emission bands from Ce3+ 5d→2FJ(J=5/2, 7/2)were found at about 393, 424 nm. The emission bands of Tb3+-doped BaCa2(BO3)2 consists of four components, which correspond to the 5D4-7FJ(J=3, 4, 5, 6) transitions with the dominant 5D4-7F5 transition at 543 nm. The energy-transfer between Ce3+ and Tb3+ occurs in Ce3+, Tb3+ co-activated BaCa2(BO3)2 phosphors.