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Journal of Lightwave Technology

Journal of Lightwave Technology


  • Vol. 27, Iss. 22 — Nov. 15, 2009
  • pp: 5145–5150

Effect of Phosphor Particle Size on Luminous Efficacy of Phosphor-Converted White LED

Nguyen The Tran, Jiun Pyng You, and Frank G. Shi

Journal of Lightwave Technology, Vol. 27, Issue 22, pp. 5145-5150 (2009)

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In this paper, the influence of YAG:Ce phosphor particle sizes on the lumen output and the conversion efficiency of both in-cup phosphor and top remote phosphor LED packages are investigated with 3-D ray-tracing simulations. The lumen output and the conversion efficiency of both types of phosphor-converted (pc) white LED packages are dependent on the size of YAG:Ce particles. The lumen output and conversion efficiency of both types of pc-white LED packages are minimal at the phosphor particle size with the size parameter of around one and are highest at the particle size in micron size. The simulation results show that both in-cup and top remote phosphor packages have the highest lumen output and the highest conversion efficiency at the particle size of around 20 $\mu{\hbox {m}}$.

© 2009 IEEE

Nguyen The Tran, Jiun Pyng You, and Frank G. Shi, "Effect of Phosphor Particle Size on Luminous Efficacy of Phosphor-Converted White LED," J. Lightwave Technol. 27, 5145-5150 (2009)

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  1. K. Yamada, Y. Imai, K. Ishii, "Optical simulation of light source devices composed of blue LEDs and YAG phosphor," J. Light Vis. Environ. 27, 70-74 (2003).
  2. N. Narendran, Y. Gu, J. P. Freyssinier-Nova, Y. Zhu, "Extracting phosphor-scattered photons to improve white LED efficiency," Phys. Stat. Solidi (a) 202, R60-R62 (2005).
  3. Y. C. Kang, I. W. Lenggoro, S. B. Park, K. Okuyama, "YAG:Ce phosphor particles prepared by ultrasonic spray pyrolysis," Mater. Res. Bull. 35, 789-798 (2000).
  4. F. Yuan, H. Ryu, "Ce-doped YAG phosphor powders prepared by co-precipitation and heterogeneous precipitation," Mater. Sci. Eng. B107, 14-18 (2004).
  5. H. Kuma, Fluorescent conversion medium and color light emitting device U.S. Patent 2007/0165661 A1 (2007).
  6. H. Chen, LED structure with ultraviolet-light emission chip and multilayered resins to generate various colored lights U.S. Patent 5,962,971 (1999).
  7. A. Duggal, Phosphors for white light generation from UV emitting diodes U.S. Patent 6,294,800 B1 (2001) .
  8. T. Taguchi, Y. Uchida, K. Kobashi, "Efficient white LED lighting and its application to medical fields," Phys. Stat. Solidi (a) 202, 2730-2735 (2004).
  9. N. T. Tran, C. G. Campbell, F. G. Shi, "Study of particle size effects on an optical fiber sensor response examined with Monte Carlo simulation," Appl. Opt. 45, 7557-7566.
  10. M. J. Manning, CMP pad with composite transparent window U.S. Patent 6,832,947 B2 (2004).
  11. N. T. Tran, F. G. Shi, "Study of phosphor concentration and thickness for phosphor-based white light-emitting-diodes," J. Lightw. Technol. 26, 3556-3559 (2008).

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