| 范应娟,张方辉,张思璐,牟强.红色磷光材料Ir(hpiq)3对白光LED显色性能的影响[J].光电子激光,2015,26(1):25~29 |
| 红色磷光材料Ir(hpiq)3对白光LED显色性能的影响 |
| Influence of red phosphorescent material Ir(hpiq)3on color rendering performance of white LED |
| 投稿时间：2014-10-15 |
| DOI： |
| 中文关键词: LED 红色高效磷光材料 显色指数(CRI) 驱动电 流 |
| 英文关键词:LED red efficient phosphorescent materials CRI drivin g current |
| 基金项目:国家自然科学基金(61076066)和陕西省科技统筹创新工程(2011KTCQ01-09)资助项目 (1.陕西科技大学 理学院,陕西 西安 710021; 2.陕西科技大学 电气与信息工程学院, 陕西 西安 710021) |
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| 中文摘要: |
| 分别将质量分数为0、1%、2%和3%的有机磷光材 料Ir(hpiq)3混合加入YAG荧光粉中,经点粉、 点胶等工序制成LED器件。研究了有机磷光材料掺杂浓度、驱动条件对器件显色指数CRI的影响；通过测试填 充硅胶和增加配光透镜前后LED器件的CRI变化,研究二者对器 件CRI的影响。实验结果表明, 随着Ir(hpiq)3浓度的增加,器件CRI也随之增加 ,平均CRI由62.7增加到了85.7。其原因为随着 红色磷光材料质量分数的增加,LED管芯所激发的蓝光被吸收的概率越高,器 件的红光成分也在不断增加, 对应的CRI在不断提高。随着电流的增加,除了质量分数为2% 的样品的CRI变化曲线为几乎平 行于横轴的直线外,其余样品的CRI随电流变化都有明显改变。其原因是红光成 分的增加和光辐射转 换效率降低互相竞争的结果。分析了填充硅胶和增加配光透镜前后,样品显CRI随电流变 化的规律及原因。 |
| 英文摘要: |
| The Ir(hpiq)3is mixed into YAG phosphors with the weight concentrations of 0%,1%,2% and 3%,respectively.The influence of doping concentration and driving conditions on color rendering index (CRI) of the device is researched.Through testing CRI values o f LED before and after filling with silica gel and installing the light distribution lens,the influence of th e both on CRI is researched.The experimental results show that with the increase of concentration of Ir(hpiq)3,the CRI of device also increases and the average CRI changes from 62.7to 85.7.The reason is that with the increase of concentration of red phosphorescent materials,the blue light that LED chips emit is absorbed more and the red components also increase,so the CRI is improved continuously.With the in crea se of the current,except that the CRI changing curve of the sample with the concentration of 2% is almost a straight line whic h is parallel to horizontal axis,the change of CRI of the remaining samples is obvious.The reason is the increase of red components and the decrease of optical radiation conversion efficiency.In this paper,the r eason that the CRI of the samples changes with the current before and after filling with silica gel and installing the light distribution lens is analyzed. |
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