A series of Fluorapatite-structured phosphors with structural formula Y₆Ba₄(SiO₄)₆F₂ (YBSF) doped with different mol% (0.2, 0.4, 0.6, 0.8 & 1) of terbium were synthesized by solid-state reaction method and its structural and photoluminescence (PL) properties were studied. X-ray diffraction (XRD) patterns confirm that the prepared phosphors were successfully synthesized in the form of hexagonal crystal structure with space group P6₃/m. Prepared phosphors are polycrystalline in nature with rod-like structure and all the initial reactants were present. Presence of Si–H stretching in Fourier transform Infrared spectroscopy confirms the successful incorporation of terbium ion in the Host lattice. Photoluminescence excitation and emission spectra of the as-prepared phosphors show different transition of 4f⁸–4f⁷5d and 4f–4f; moreover, the prepared phosphors when excited with 250 nm show blue emission due to ⁵D₃–⁷F_J and show green emission due to ⁵D₄–⁷F_J when excited by 290 nm. The results indicate that the emitted wavelength depend on excited wavelength and, therefore, can be tuned accordingly. The mechanism behind color tuning is due to cross-relaxation process which is discussed in detail in the present paper. The prepared phosphors showed high quantum efficiency with satisfactory thermal stability. Commission Internationale de I’Eclairage chromaticity coordinate also shows the shifting from blue region to green region for the prepared phosphors.

通过固相反应法合成了一系列掺有不同摩尔％（0.2、0.4、0.6、0.8和1）b的 结构式为Y ₆ Ba ₄（SiO ₄）₆ F ₂（YBSF）的磷灰石结构荧光粉。并对其结构和光致发光性能进行了研究。X射线衍射（XRD）图案证实了所制备的荧光粉已成功合成具有空间群P6 ₃的六方晶体结构形式/米。制备的磷光体本质上是具有棒状结构的多晶，并且存在所有初始反应物。Si-H拉伸在傅立叶变换红外光谱中的存在证实了ion离子已成功掺入主体晶格中。所制备的荧光粉的光致发光激发光谱和发射光谱显示4f ⁸ –4f ⁷ 5d和4f-4f具有不同的跃迁。此外，当与250个纳米激发的制备荧光体显示蓝色发光，由于⁵ d ₃ - ⁷ ˚F _Ĵ，并显示绿色发光，由于⁵ d ₄ - ⁷ ˚F _Ĵ当被290 nm激发时 结果表明，发射波长取决于激发波长，因此可以相应地进行调谐。颜色调整背后的机制是由于交叉松弛过程引起的，本文将对此进行详细讨论。制备的磷光体显示出高的量子效率和令人满意的热稳定性。国际照明委员会的色度坐标还显示了制备的荧光粉从蓝色区域到绿色区域的转变。