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中文摘要：
为了提高白光发光二极管（LED）的显色指数，在传统白光LED的YAG粉胶层之上分别滴加0．0、1．0、3．0、4．0和5．5mgRu（dtb—bpy）3·2（PF6）的四氢呋喃溶液，制备了5种白光LED样品，并对样品的发光特性进行了检测。结果表明，随着Ru（＇dtb—bpy）3：2（PF6）材料含量的增加，样品的发光强度逐渐减弱，发光光谱出现红移现象；并且Ru（dtb—bpy）3·2（PF6）有一最佳含量，即当滴加的Ru（dtb～bpy）3·2（PF6）溶液为4．0mg时，LED样品的显色指数（CRI）有明显提高，达到最高值为84．5。
英文摘要：
To improve the color rendering index （CRI） of white LEDs, we fabricated white light LED samples of 0# --4# ,by putting 0.0 mg,1.0 mg,3 - 0 mg,4.0 mg,5.5 mg Ru（dtb-bpy）3.2（PF6） THF solution on the YAG powder coating of the conservative white light LED. We tested the emitting specra, color rending index and other parameters of these samples. The results show that the white LED can excite the Ru（dtb-bpy）3 - 2（PF6） materials. With the increase of the content of the Ru（dtb-bpy）3 - 2 （PF6）, the radiation intensity of blue-chip is weakened gradually, but the phosphor spectra present intensity attenuation and red shift. Moreover, we obtain the white light LED with the highest color rendering index of 84. 5 while putting 4.0 mg Ru（dtb-bpy）3 - 2（PF6） THF solution on the YAG powder coating of the conservative white light LED,and the color rendering index increases by 13%compared with that of the conservative white light LED,but the luminous efficiency shows attenuation to some extent.
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