Potassium yttrium borate (KY_(1-x)Sm_xBO₃) referred as KYBO:Sm³⁺ phosphors with the varying of Sm³⁺ ions (x = 0.005, 0.01, 0.05, 0.1, 0.2, 0.3, 0.5 mol%) were fabricated via the solid-state reaction process. The structural and optical studies were systematically investigated via X-ray diffractometer (XRD), excitation (PLE), emission (PL) spectra, and decay curves. The structure of KYBO:Sm³⁺ phosphors is attributed to hexagonal with an average particle size of 34 nm. Scanning electron microscopy (SEM) image and energy dispersive X-ray analysis (EDAX) spectrum were also studied. The dominant excitation wavelength at 406 nm is ascribed to ⁶H_5/2 → ⁴F_7/2 transition and the emission spectra exhibits three peaks at 573, 609 and 656 nm belonging to ⁴G_5/2 → ⁶H_{5/2, 7/2, 9/2} transitions of Sm³⁺ ions, respectively. Critical distance (R_c) and energy transfer rates (A_rad) were also calculated. The energy transfer (ET) mechanism from luminescence spectra was proved by Dexter and Schulman theory. The decay of ⁴G_5/2 level for KYBO:Sm³⁺ phosphors exhibited non-exponential nature by shortening the lifetime from 1.85 to 0.3 ms. Moreover, the photometric parameters such as color coordinates (0.557, 0.440), correlated color temperatures (CCT:1784–2552 K), and color purity (CP:93–96%) were also obtained for KYBO:Sm³⁺ phosphors. These results considered to be in the orange-red emission region for warm white light-emitting diodes.

硼酸钇钾 (KY _(1-x) Sm _x BO ₃ ) 称为 KYBO:Sm ³⁺荧光粉，随 Sm ³⁺离子的变化(x = 0.005, 0.01, 0.05, 0.1, 0.2, 0.3, 0.5 mol%)是通过固态反应过程制造的。通过 X 射线衍射仪 (XRD)、激发 (PLE)、发射 (PL) 光谱和衰减曲线系统地研究了结构和光学研究。KYBO:Sm ³⁺荧光粉的结构属于六边形，平均粒径为34 nm。还研究了扫描电子显微镜 (SEM) 图像和能量色散 X 射线分析 (EDAX) 光谱。406 nm 处的主要激发波长归因于⁶ H _5/2 →  ⁴ F _7/2跃迁和发射光谱在 573、609 和 656 nm 处显示三个峰，分别属于 Sm ³⁺离子的⁴ G _5/2  →  ⁶ H _{5/2、7/2、9/2}跃迁. 还计算了临界距离 (R _c ) 和能量转移率 (A _rad )。Dexter 和 Schulman 理论证明了来自发光光谱的能量转移 (ET) 机制。KYBO:Sm ^{3+ 4} G _5/2电平衰减通过将寿命从 1.85 毫秒缩短到 0.3 毫秒，荧光粉表现出非指数性质。此外，还获得了 KYBO:Sm ³⁺荧光粉的光度参数，例如色坐标 (0.557, 0.440)、相关色温 (CCT:1784–2552 K) 和色纯度 (CP:93–96%) 。这些结果被认为是在暖白色发光二极管的橙红色发射区域内。