| 提高基于粉浆法的功率型白光LEDs发光效率的研究 |
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| 引用本文： | 李君飞,饶海波,侯斌,胡玥,申发华. 提高基于粉浆法的功率型白光LEDs发光效率的研究[J]. 半导体学报, 2008, 29(5): 984-987 |
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| 作者姓名： | 李君飞 饶海波 侯斌 胡玥 申发华 |
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| 作者单位： | 电子科技大学光电信息学院,成都610054 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 基于水溶性感光胶的自光LEDs平面涂层技术，在蓝光LED芯片表面上得到了可控的荧光粉层．采用降低粉浆中ADC的浓度和提高荧光粉的含量两种措施，减少Cr^3＋在433．6和620nm两处吸收对器件出光效率的影响；新配制的粉浆在暗室中静置3～5h，既可以提高器件的出光效率同时又避免了暗反应带来的影响；在蓝光LED表面上得到粉层后，再涂覆硅胶层，由于硅胶的折射率与粉层的更接近，不但使出光色调偏向蓝光区域而且有更多光子出射，光通量由未加硅胶层时的44．8～59lm提高到了79．4～84．9lm．
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| 关 键 词： | 白光LEDs 粉浆 出光效率 封装 |
| 文章编号： | 0253-4177(2008)05-0984-04 |
| 修稿时间： | 2007-12-03 |
Improving the Luminescence Efficiency of Power White LEDs with Slurry |
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| Li Junfei,Rao Haibo,Hou Bin,Hu Yue and Shen Fahua. Improving the Luminescence Efficiency of Power White LEDs with Slurry[J]. Chinese Journal of Semiconductors, 2008, 29(5): 984-987 |
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| Authors: | Li Junfei Rao Haibo Hou Bin Hu Yue Shen Fahua |
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| Affiliation: | School of Opto-Electronic Information, University of Electronic Science and Technology of China, Chengdu 610054,China;School of Opto-Electronic Information, University of Electronic Science and Technology of China, Chengdu 610054,China;School of Opto-Electronic Information, University of Electronic Science and Technology of China, Chengdu 610054,China;School of Opto-Electronic Information, University of Electronic Science and Technology of China, Chengdu 610054,China;School of Opto-Electronic Information, University of Electronic Science and Technology of China, Chengdu 610054,China |
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| Abstract: | The slurry method based on water soluble PVA is discussed.A controlled phosphor layer is obtained by the slurry method on the surface of blue LED chips.Due to the absorption of Cr3+,the luminous intensity of white LEDs can be improved by decreasing the concentration of ADC or increasing the concentration of phosphor in the slurry.The stand-time of slurry for 3~5h was optimized in a darkroom.The hue of output light moved to the blue-light zone and the luminous flux increased from 44.8~59 lm to 79.4~84.9 lm after the silica gel was coated on the LED coated phosphor particles. |
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| Keywords: | white LEDs slurry luminous performance packaging |
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