Doping heteroatom in phosphor can effectively improve luminescent properties, which has attracted great attention recently. GdAlO3 phosphors (GAP) doped with Er³⁺/Yb³⁺/Tm³⁺ were prepared via the co-precipitation method. Upon 980 nm excitation, strong blue, green, and red up-conversion (UC) emissions centered at 476, 524, 546, and 659 nm were observed, which could be successfully combined to form pure white light. It was found that changing the doping concentration of Er³⁺ and Yb³⁺ ions, the calcination temperature of the precursor, the laser power of the excitation light source, and doping Li+ could systematically adjust red/green/blue colors of GdAlO3:Er3+/Yb3+/Tm3+ phosphors to optimize the white emitting luminescence. When the Er3+ doping concentration of the phosphors increased, each color distribution successfully moved, making the maximum shift of the CIE coordinate. Finally, the influence of each factor on adjusting the UC white light performance and its mechanism were explored.

在荧光粉中掺杂杂原子可以有效地改善发光性能，近来引起了极大的关注。通过共沉淀法制备了掺有Er ³⁺ / Yb ³⁺ / Tm ^3+的GdAlO3荧光粉（GAP）。在980 nm激发后，观察到以476、524、546和659 nm为中心的强烈的蓝色，绿色和红色上转换（UC）发射，可以成功组合以形成纯白光。发现改变Er ³⁺和Yb ³⁺的掺杂浓度离子，前驱体的煅烧温度，激发光源的激光功率和掺杂Li +可以系统地调节GdAlO3：Er3 + / Yb3 + / Tm3 +荧光粉的红色/绿色/蓝色，以优化白色发光。当荧光粉的Er3 +掺杂浓度增加时，每种颜色分布都会成功移动，从而使CIE坐标发生最大位移。最后，探讨了各个因素对调节UC白光性能的影响及其机理。