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J. Semicond. > 2008, Volume 29?>?Issue 5?> 984-987

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Improving the Luminescence Efficiency of Power White LEDs with Slurry

Li Junfei, Rao Haibo, Hou Bin, Hu Yue and Shen Fahua

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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.

Key words: white LEDs, slurry, luminous performance, packaging

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    Received: 18 August 2015 Revised: 03 December 2007 Online: Published: 01 May 2008

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      Li Junfei, Rao Haibo, Hou Bin, Hu Yue, Shen Fahua. Improving the Luminescence Efficiency of Power White LEDs with Slurry[J]. Journal of Semiconductors, 2008, 29(5): 984-987. ****Li J F, Rao H B, Hou B, Hu Y, Shen F H. Improving the Luminescence Efficiency of Power White LEDs with Slurry[J]. J. Semicond., 2008, 29(5): 984.
      Citation:
      Li Junfei, Rao Haibo, Hou Bin, Hu Yue, Shen Fahua. Improving the Luminescence Efficiency of Power White LEDs with Slurry[J]. Journal of Semiconductors, 2008, 29(5): 984-987. ****
      Li J F, Rao H B, Hou B, Hu Y, Shen F H. Improving the Luminescence Efficiency of Power White LEDs with Slurry[J]. J. Semicond., 2008, 29(5): 984.

      Improving the Luminescence Efficiency of Power White LEDs with Slurry

      • 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

      • Received Date: 2015-08-18
      • Accepted Date: 2007-10-11
      • Revised Date: 2007-12-03
      • Published Date: 2008-05-05

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