Journal of the Optical Society of Korea

  • 제17권1호
  • /
  • Pages.22-26
  • /
  • 2013
  • /
  • 1226-4776(pISSN)
  • /
  • 2093-6885(eISSN)
한국광학회 (Optical Society of Korea)
권호 표지
DOI QR코드

DOI QR Code

Analysis on the Luminous Efficiency of Phosphor-Conversion White Light-Emitting Diode

  • 투고 : 2012.10.30
  • 심사 : 2013.01.10
  • 발행 : 2013.02.25
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

The author analyzes the luminous efficiency of the phosphor-conversion white light-emitting diode (LED) that consists of a blue LED chip and a yellow phosphor. A theoretical model is derived to find the relation between luminous efficiency (LE) of a white LED, wall-plug efficiency (WPE) of a blue LED chip, and the phosphor absorption ratio of blue light. The presented model enables to obtain the theoretical limit of LE and the lower bound of WPE. When the efficiency model is applied to the measured results of a phosphor-conversion white LED, the limit theoretical value of LE is obtained to be 261 lm/W. In addition, for LE of 88 lm/W at 350 mA, the lower bound of WPE in the blue LED chip is found to be ~34%. The phosphor absorption ratio of blue light was found to have an important role in optimizing the luminous efficiency and colorimetric properties of phosphor-conversion white LEDs.

키워드

참고문헌

  1. E. F. Schubert and J. K. Kim, "Solid-state light sources getting smart," Science 308, 1274-1278 (2005). https://doi.org/10.1126/science.1108712
  2. G. Harbers, S. J. Bierhuizen, and M. R. Krames, "Performance of high power light emitting diodes in display illumination applications," J. Display Technol. 3, 98-108 (2007). https://doi.org/10.1109/JDT.2007.894384
  3. G. Chen, M. Craven, A. Kim, A. Munkholm, S. Watanabe, M. Camras, W. Gotz, and F. Steranka, "Performance of high-power III-nitride light emitting diodes," Phys. Status Solidi A 205, 1086-1092 (2008). https://doi.org/10.1002/pssa.200778747
  4. A. Laubsch, M. Sabathil, J. Baur, M. Peter, and B. Hahn, "High-power and high-efficiency InGaN-based light emitters," IEEE Trans. Electron. Devices 57, 79-87 (2010). https://doi.org/10.1109/TED.2009.2035538
  5. Y. Narukawa, M. Ichikawa, D. Sanga, M. Sano, and T. Mukai, "White light emitting diodes with super-high luminous efficacy," J. Phys. D: Appl. Phys. 43, 354002 (2010). https://doi.org/10.1088/0022-3727/43/35/354002
  6. J. Piprek, "Efficiency droop in nitride-based light-emitting diodes," Phys. Status Solidi A 207, 2217-2225 (2010). https://doi.org/10.1002/pssa.201026149
  7. M. H. Crawford, "LEDs for solid-state lighting: performance challenges and recent advances," IEEE J. Select. Topics Quantum Electron. 15, 1028-1040 (2009). https://doi.org/10.1109/JSTQE.2009.2013476
  8. H. Y. Ryu, D. S. Shin, and J. I. Shim, "Analysis of efficiency droop in nitride light-emitting diodes by the reduced effective volume of InGaN active material," Appl. Phys. Lett. 100, 131109 (2012). https://doi.org/10.1063/1.3698113
  9. N. Ohta and A. Robertson, Colorimetry: Fundamentals and Applications (Wiley, 2006), Chapter 1 and 3.
  10. E. F. Schubert, Light-emitting Diodes (Cambridge University Press, UK, 2006), Chapter 16-18.
  11. D. K. Son, E. B. Cho, I. Moon, Y. Park, and C. G. Lee, "Development of an illumination measurement device for color distribution based on a CIE 1931 XYZ sensor," J. Opt. Soc. Korea 15, 44-51 (2011). https://doi.org/10.3807/JOSK.2011.15.1.044
  12. C. G. Son, J. H. Yi, J. S. Gwag, and J. H. Kwon, and G. Park, "Improvement of color and luminance uniformity of the edge-lit backlight using the RGB LEDs," J. Opt. Soc. Korea 15, 272-277 (2011). https://doi.org/10.3807/JOSK.2011.15.3.272

피인용 문헌

  1. Luminescent Properties of BaSi2O5:Eu2+Phosphor Film Fabricated by Spin-Coating of Ba-Eu Precursor on SiO2Glass vol.18, pp.1, 2014, https://doi.org/10.3807/JOSK.2014.18.1.045
  2. Out-of-Band Measurement of LED-based Solar Blind UV Filters vol.18, pp.3, 2014, https://doi.org/10.3807/JOSK.2014.18.3.244
  3. Optical Design of Multimedia-Embedded LED Dental Astral Lighting using the Reverse Dual Reflector Method vol.19, pp.4, 2015, https://doi.org/10.3807/JOSK.2015.19.4.409
  4. Spectral optimization simulation of white light based on the photopic eye-sensitivity curve vol.119, pp.5, 2016, https://doi.org/10.1063/1.4941396
  5. Analysis of the LED Lamp Arrangement for Uniformity of Illumination in Indoor VLC System vol.18, pp.6, 2014, https://doi.org/10.3807/JOSK.2014.18.6.663
  6. Photoluminescence properties of BaMoO4:RE3+ (RE = Eu, Sm, Dy, Tb, Tm) phosphors vol.69, pp.9, 2016, https://doi.org/10.3938/jkps.69.1479
  7. Analysis of the Temperature Dependence of Phosphor Conversion Efficiency in White Light-Emitting Diodes vol.19, pp.3, 2015, https://doi.org/10.3807/JOSK.2015.19.3.311