基于远程荧光技术的高显指白光LED的制备和性能研究

发布时间：2018-07-07 19:19

本文选题：远程荧光 + 高显色指数　；参考：《光谱学与光谱分析》2017年03期

【摘要】：针对目前LED灯具在照明方面显色性不足,以及传统LED点胶封装所存在的芯片发热导致荧光粉性能衰减、色温漂移、出光不均匀等问题,采用近年来新兴的远程荧光封装方式。用黄绿色YGG荧光粉和氮化物红色荧光粉,与硅胶制成远程荧光片封装成LED灯具。通过大量实验确定了黄绿粉、红粉与硅胶的最佳比例,制备了不同色温的LED灯具,并选择了色坐标,光效,显色指数,R9,色质指数,色温,全色域指数等参数对灯具进行了测试与分析,为优质LED照明提供了更客观地综合评价。实验结果表明红粉与黄绿粉的最佳比例为1:7.6,荧光粉总量与硅胶最佳比例为1:5,此时制成的白光LED灯具的色温为4 113 K,色坐标(x,y)为(0.375 4,0.373 1),光效为52.33 lm·w~(-1),色域度为0.981,显色指数高达96,其中R9为97。色质指数Qa值高达93,全色域指数为79。同时相较于传统封装而言,远程荧光封装的荧光板表面温度大大低于点胶封装荧光粉表面温度,可以有效地避免温度过高对LED产生的不良影响。
[Abstract]:In view of the shortage of LED Luminaires in lighting, as well as the degradation of the phosphor properties, the drift of color temperature and the unevenness in the traditional LED chip packaging, the newly emerging remote fluorescent packaging methods have been adopted in recent years. The long distance fluorescence is made from the yellow green YGG phosphor and the nitride red phosphor and the silica gel. The film is packaged into LED lamp. Through a large number of experiments, the optimum proportion of yellow green powder, red powder and silica gel is determined, and the LED lamps with different color temperature are prepared. The color coordinates, light effect, color index, R9, color quality index, color temperature and total color domain index are selected to test and analyze the lamps and lanterns, which provide a more objective comprehensive evaluation for high quality LED lighting. The experimental results show that the optimum proportion of red powder and yellow green powder is 1:7.6, the optimum proportion of the total fluorescent powder and silica gel is 1:5, the color temperature of the white light LED lamps is 4113 K, the color coordinates (x, y) is (0.375 4,0.373 1), the light effect is 52.33 LM. W~ (-1), the color gamut is 0.981, the color index is up to 96, and R9 is 97. color index Qa value up to 93, panchromatic color. The domain index is 79. and compared to the traditional packaging, the surface temperature of the fluorescent plate in the remote fluorescent package is much lower than the surface temperature of the gel encapsulated phosphor. It can effectively avoid the adverse effects of the high temperature on the LED.
【作者单位】：南京工业大学材料科学与工程学院;南京工业大学电光源材料研究所;南京工业大学能源科学与工程学院;
【基金】：国家重点研发计划项目(2016YFB0400600) 江苏省科技成果转化专项基金项目(BA2014073) 科研院所专项项目(2013EG111218,2014EG111223) 国家高技术研究发展计划项目(2011AA03A107)资助
【分类号】：TN312.8

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