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）3 is 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 researche＆ Through testing CRI values of LED before and after filling with silica gel and installing the light distribution lens, the influence of the 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 62.7 to 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 increase of the current, except that the CRI changing curve of the sample with the concentration of 2 % is almost a straight line which 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 reason 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.