Currently, phosphor composite films draw much attention in white laser lighting. In this work, we developed a novel phosphor-SiO₂ film via a mild method, which avoiding the phosphor degradation. Commercial colloidal silica was elected as the source of SiO₂ and acted as an inorganic binder, gap filler and a protective coating layer. Composite films comprised of mixed Lu₃Al₅O₁₂:Ce³⁺ and CaAlSiN₃:Eu²⁺ phosphors exhibit a uniform dense strucure and strong adhesion to the substrate. When excited by blue diodes laser, the optimal film exhibits excellent thermal stability (it maintains 89.1 % of the room-temperature intensity at 200 °C), super resistance against laser irradiation (12.9 W/mm²), a broad emission spectra with a full width at half maximum of 180 nm and a high luminous efficiency (183 lm/W). The color rendering index of the film was improved to 85. These outstanding properties indicate that the derived films are a promising candidate for white laser lighting.

当前，磷光体复合膜在白色激光照明中备受关注。在这项工作中，我们通过温和的方法开发了一种新型的荧光粉-SiO ₂膜，该膜避免了荧光粉的降解。商业胶态二氧化硅被选作SiO ₂的来源，并充当无机粘合剂，缝隙填充剂和保护涂层。由混合的Lu ₃ Al ₅ O ₁₂：Ce ³⁺和CaAlSiN ₃：Eu ²⁺组成的复合膜磷光体显示出均匀的致密结构和对基材的强粘附力。当被蓝光二极管激光器激发时，最佳的薄膜具有出色的热稳定性（在200°C时可保持89.1％的室温强度），超强的抗激光辐照性（12.9 W / mm ²），宽广的发射光谱和半高全宽为180 nm，发光效率高（183 lm / W）。薄膜的显色指数提高到85。这些出色的性能表明，衍生的薄膜是白色激光照明的有希望的候选者。