抽光层掺杂纳米颗粒对白光LED模块光色性能的影响

Effect of Isolation Doped Nanoparticles on the Optical Color Performance of White LED Modules

采用热溶液法在倒装芯片表面涂覆掺杂有纳米颗粒的抽光层,在抽光层上涂覆荧光粉层制备白光LED模块。利用仪器设备对样品的光色性能进行了测量和分析。实验发现,TiO_(2)掺杂颗粒粒径由16 nm增大到46 nm,模块光效幅度增加0.75%,色温提升0.57%,空间角度色温均匀性由0.869 3增大到0.87;通过调节TiO_(2)颗粒掺杂浓度,发现模块色温平均值先升后降,分布呈边缘低中间高的态势;在掺杂浓度为0.8%时,模块光效提高约5.75%,平均色温提高了9.17%。结果表明,在满足Rayleigh散射条件下,粒径大小对模块光色性能影响不明显。通过在抽光层掺杂一定比例的TiO_(2)纳米颗粒,可提高白光LED模块出光效率,同时能有效改善模块的空间色温均匀性。

The surface of the flip chip was coated with an extraction layer doped with nanoparticles by hot solution method,and the phosphor layer was coated on extraction layer to prepare the white LED module. The photochromatic properties of the samples were measured and analyzed by means of instruments.The experimental results showed that when the particle size of TiO_(2)doped particles increased from 16 nm to 46 nm,the optical efficiency amplitude of the module increased by0.75%,the color temperature increased by 0.57%,and the color temperature uniformity of spatial angle increased from 0.869 3 to 0.87. By adjusting the doping concentration of TiO_(2)particles,it was found that the average color temperature of the module could rise first and then fell,and the distribution showed a trend of low edge and high middle. When the doping concentration was 0.8%,the optical efficiency of the module increased by about 5.75% and the average color temperature increased by9.17%.The results showed that under the condition of Rayleigh scattering,the particle size had no obvious effect on the optical performance of the module. By doping a certain proportion of TiO_(2)nanoparticles in the optical extraction layer,the light output efficiency of the white LED module could be improved,and the spatial color temperature uniformity of the module could be effectively improved.