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利用高温热压成型工艺制备纳米SiO_2混合的远程荧光粉膜,并封装成白光LED器件,利用荧光光谱仪、紫外-可见光-近红外光谱仪研究SiO_2浓度和输入电流对远程荧光粉膜和白光LED器件的光谱性能的影响。研究结果表明:膜材料和器件的发射强度随着SiO_2浓度的增加,先提高后降低,在浓度为0.006 3 g/cm~3时,白光LED器件光通量达到360.52 lm,提高了3.82%;器件的色坐标和光谱分布曲线在不同电流驱动下,变幅较小,具有一定的稳定性,蓝光、黄光和白光的光功率均随着电流线性提高,因此,纳米SiO_2在优化白光LED器件封装中具有一定的应用价值。
The long-distance nano-SiO_2 hybrid phosphor films were prepared by high-temperature thermocompression molding and encapsulated into white LED devices. The effects of SiO 2 concentration and input current on the performance of remote phosphor films and white LED devices were studied by using fluorescence spectroscopy and UV-Vis-NIR spectroscopy Effect of spectral performance. The results show that the emission intensity of the film material and device first increases and then decreases with the increase of SiO 2 concentration. The luminous flux of the white LED device reaches 360.52 lm at the concentration of 0.006 3 g / cm ~ 3, which increases by 3.82% The color coordinates and the spectral distribution curve are smaller and have a certain stability under the different current driving. The optical power of blue, yellow and white light increases linearly with the current. Therefore, Has a certain application value.