中文摘要：

采用440 nm短波长InGaN/GaN基蓝光LED芯片激发高效红、绿荧光粉制得高显色性白光LED,研究了不同胶粉配比对LED发光性能的影响,结果表明,A胶、B胶、绿粉、红粉比重在0.5：0.5：0.2：0.03时,在440 nm蓝光激发下呈现了有两个谱带组成的发光光谱,分别是峰值为535 nm的特征光谱和643nm的特征光谱,胶粉通过均匀调配后能够有效的进行混光产生低色温白光,实验中最低色温可达3 251 K,显色指数高达88.8,这比传统蓝光激发YAG荧光粉制得的白光LED色温更低,显色指数提高了26%。

英文摘要：

The luminescence properties of high color rendering white LED depending on the proportions of mixed phosphor powders were investigated by adopting green and red phosphors stimulated by a 440 nm InGaN/GaN based blue LED.The results show that when the proportion of A/B type silica gels and green/red phosphor powders is 0.5∶0.5∶0.2∶0.03,two luminance bands are stimulated and their wavelength peaks are 535 and 643 nm,respectively.The minimum color temperature can reach 3 251 K,while the color rendering is as high as 88.8.Compared with the traditional white LED fabricated by yellow YAG-phosphors-coated high efficiency 460 nm blue LED,the color temperature is lower and the color rendering index can be increased by almost 26%.