仿生蛾眼微阵列结构的荧光粉层荧光转换效率优化仿真研究OA

Phosphor-converted materials are widely used in fields such as laser displays and high-power lighting.However,problems including internal scattering within the phosphor layer,Fresnel reflection at interfaces,and the angular dispersion of the emitted light constrain the light extraction efficiency and the quality of the output light.In this paper,a bionic moth-eye microstructure array is constructed on the surface of the phosphor layer;by exploiting its graded-refractive-index characteristics to suppress interfacial reflection,synergistic anti-reflection and light-field modulation are achieved for both the incidence of the excitation light and the emission of the fluorescence.Through systematic simulation,key parameters—including the base diameter,base fill factor,structure height,and anti-reflection layer thickness—were optimized to obtain the optimal structural scheme(base diameter of 375 nm,fill factor of 0.78,height of 325 nm,and anti-reflection layer thickness of 50 nm).Compared with the scheme without microstructures,the relative fluorescence conversion efficiency is improved by 4.7%,and the directionality factor increases from 1.9505 to 1.9678,indicating that the collimation and directionality of the output beam are significantly enhanced.The results demonstrate that the moth-eye microstructure can effectively reduce interfacial reflection loss and synergistically improve both the light extraction efficiency and the beam quality,providing a feasible solution for the engineering design of efficient phosphor-conversion devices and advanced lighting systems.