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《Journal of Functional Materials》 2011-10
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Influence of organic fluorescence material DCJTB by coating stratified on luminescence of white LED

BI Chang-dong,ZHANG Fang-hui,ZHANG Mai-li,MA Ying(College of Electric and Communication,Shaanxi University of Science and Technology,Xi'an 710021,China)  
The excitation spectrum of white LED was studied in this paper.Here,the DCJTB was coated to the LED chips,then the YAG phosphor on top of DCJTB.Its proportion was 0,1%,2%,3%,5% and 10%.From the results of mixing concentration increasing,we found that the peaks were significant increase in the region of red and yellow(550-750nm),meanwhile it reached to the maximum near 600nm.What's more,spectral color coordinates moved from white region(0.2856,0.2883) to red region(0.4373,0.3377) and its color-rendering index reached to the maximum of 88.2.Therefore,the LED chips' energy could stimulate organic materials DCJTB by the method of pointing layers phosphor.Then the mixing of red light and yellow light emitted from YAG phosphor could get white light which had a better color-rendering index.
【Fund】: 国家自然科学基金资助项目(61076066);; 陕西科技大学科研启动基金资助项目(BJ09-07) 陕西科技大学自然科学基金资助项目(ZX09-31)
【CateGory Index】: TN312.8
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