While phosphor-in-glass (PiG) technology is widely used in white light-emitting diodes (WLEDs), the adhesive layer between the PiG plate and the blue LED chip does not match their refractive indices, resulting in a reduction in efficiency. To address this issue, we applied ZrO₂ nanoparticles with an average particle size of 10 nm to the adhesive layer as refractive index enhancer and light scattering additives in the form of polymer matrix nanocomposites. An adhesive layer with proper ZrO₂ nanoparticles can enhance the luminous flux and efficacy of the WLED by refractive index matching, light scattering and increased view angle. The optimum ZrO₂ content in the adhesive layer was identified as 9 wt.% and in this case, the viewing angle was extended by 8% and luminous efficacy was improved by about 3.1% while maintaining uniform CCT and color bin. The methodology for improving the efficiency of LEDs demonstrated in this paper is expected to be of great help to the development of high-performance WLEDs.

尽管玻璃荧光粉（PiG）技术广泛用于白色发光二极管（WLED），但PiG板和蓝色LED芯片之间的粘合层不匹配它们的折射率，导致效率降低。为了解决这个问题，我们将平均粒径为10 nm的ZrO ₂纳米颗粒作为聚合物基质纳米复合材料形式的折射率增强剂和光散射添加剂应用于粘合剂层。具有合适的ZrO ₂纳米颗粒的粘合剂层可通过折射率匹配，光散射和增加的视角来增强WLED的光通量和功效。最佳ZrO ₂粘合剂层中的含量确定为9重量％，并且在这种情况下，在保持均匀的CCT和色箱的同时，视角扩大了8％，发光效率提高了约3.1％。预期本文中展示的提高LED效率的方法学将对高性能WLED的开发有很大帮助。