OSA's Digital Library

Energy Express

Energy Express

  • Editor: Bernard Kippelen
  • Vol. 20, Iss. S1 — Jan. 2, 2012
  • pp: A1–A12

Highly-efficient, tunable green, phosphor-converted LEDs using a long-pass dichroic filter and a series of orthosilicate phosphors for tri-color white LEDs

Ji Hye Oh, Jeong Rok Oh, Hoo Keun Park, Yeon-Goog Sung, and Young Rag Do  »View Author Affiliations


Optics Express, Vol. 20, Issue S1, pp. A1-A12 (2012)
http://dx.doi.org/10.1364/OE.20.0000A1


View Full Text Article

Enhanced HTML    Acrobat PDF (1617 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

This study introduces a long-pass dichroic filter (LPDF) on top of a phosphor-converted LED (pc-LED) packing associated with each corresponding tunable orthosilicate ((Ba,Sr)2SiO4:Eu) phosphor in order to fabricate tunable green pc-LEDs. These LPDF-capped green pc-LEDs provide luminous efficacies between 143–173 lm/W at 60 mA in a wavelength range between 515 and 560 nm. These tunable green pc-LEDs can replace green semiconductor-type III-V LEDs, which present challenges with respect to generating high luminous efficacy. We also introduce the highly-efficient tunable green pc-LEDs into tri-color white LED systems that combine an InGaN blue LED and green/red full down-converted pc-LEDs. The effect of peak wavelength in the tunable green pc-LEDs on the optical properties of a tri-color package white LED is analyzed to determine the proper wavelength of green color for tri-color white LEDs. The tri-color white LED provides excellent luminous efficacy (81.5–109 lm/W) and a good color rendering index (64–87) at 6500 K of correlated color temperature (CCT) with the peak wavelength of green pc-LEDs. The luminous efficacy of the LPDF-capped green monochromatic pc-LED and tri-color package with tunable green pc-LEDs can be increased by improving the external quantum efficiency of blue LEDs and the conversion efficiency of green pc-LEDs.

© 2011 OSA

OCIS Codes
(220.0220) Optical design and fabrication : Optical design and fabrication
(230.0230) Optical devices : Optical devices
(230.1480) Optical devices : Bragg reflectors
(230.3670) Optical devices : Light-emitting diodes

ToC Category:
Light-Emitting Diodes

History
Original Manuscript: July 29, 2011
Revised Manuscript: October 25, 2011
Manuscript Accepted: November 8, 2011
Published: November 14, 2011

Citation
Ji Hye Oh, Jeong Rok Oh, Hoo Keun Park, Yeon-Goog Sung, and Young Rag Do, "Highly-efficient, tunable green, phosphor-converted LEDs using a long-pass dichroic filter and a series of orthosilicate phosphors for tri-color white LEDs," Opt. Express 20, A1-A12 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-S1-A1


Sort:  Author  |  Year  |  Journal  |  Reset  

References

  1. J. M. Phillips, M. E. Coltrin, M. H. Crawford, A. J. Fischer, M. R. Krames, R. Mueller-Mach, G. O. Mueller, Y. Ohno, L. E. S. Rohwer, J. A. Simmons, and J. Y. Tsao, “Research challenges to ultra-efficient inorganic solid-state lighting,” Laser Photonics Rev.1(4), 307–333 (2007). [CrossRef]
  2. M. R. Krames, O. B. Shchekin, R. Mueller-Mach, G. O. Mueller, L. Zhou, G. Harbers, and M. G. Craford, “Status and future of high-power light-emitting diodes for solid-state lighting,” J. Display Technol.3(2), 160–175 (2007). [CrossRef]
  3. W. Schnick, “Shine a light with nitrides,” Phys. Status Solidi Rapid Res. Lett.3(7–8), A113–A114 (2009). [CrossRef]
  4. M. Peter, A. Laubsch, W. Bergbauer, T. Meyer, M. Sabathil, J. Baur, and B. Hahn, “New developments in green LEDs,” Phys. Status Solidi A206(6), 1125–1129 (2009). [CrossRef]
  5. H. Masui, S. Nakamura, S. P. DenBaars, and U. K. Mishra, “Nonpolar and semipolar III-nitride light-emitting diodes: achievements and challenges,” IEEE Trans. Electron. Dev.57(1), 88–100 (2010). [CrossRef]
  6. R. Mueller-Mach, G. O. Mueller, T. A. Trottier, M. R. Krames, A. Kim, and D. A. Steigerwald, “Green phosphor-converted LED,” Proc. SPIE4776, 131–136 (2002). [CrossRef]
  7. S. Kurai, H. Sakura, Y. Uchida, and T. Taguchi, “Fabrication and illuminance properties of phosphor-conversion green light-emitting diode with a luminous efficacy over 100 lm/W,” J. Light Visual Environ.31(3), 28–30 (2007).
  8. P. Schmidt, A. Tuecks, H. Bechtel, D. Wiechert, R. Mueller-Mach, G. Mueller, and W. Schnick “Layered oxonitrido silicate (SiON) phosphors for high power LEDs,” Proc. SPIE7058, 70580L (2008). [CrossRef]
  9. R. Mueller-Mach, G. O. Mueller, M. R. Krames, O. B. Shchekin, P. J. Schmidt, H. Bechtel, C.-H. Chen, and O. Steigelmann, “All-nitride monochromatic amber-emitting phosphor-converted light-emitting diodes,” Phys. Stat. Solidi Rapid Res. Lett.3(7–8), 215–217 (2009). [CrossRef]
  10. M. A. Haase, J. Xie, T. A. Ballen, J. Zhang, B. Hao, Z. H. Yang, T. J. Miller, X. Sun, T. L. Smith, and C. A. Leatherdale, “II-VI semiconductor color converters for efficient green, yellow, and red light emitting diodes,” Appl. Phys. Lett.96(23), 231116 (2010). [CrossRef]
  11. T. J. Miller, M. A. Haase, X. Sua, B. Hao, J. Zhang, T. L. Smith, T. Ballen, J. Xie, A. S. Barnes, F. Kecman, J. Yang, J. Thieleb, C. A. Leatherdale, R. Wirth, A. Biebersdorc, K. Engl, and S. Groetsch, “High efficiency green LEDs using II-VI color converters,” Proc. SPIE7617, 76171A (2010).
  12. J. R. Oh, S.-H. Cho, H. K. Park, J. H. Oh, Y.-H. Lee, and Y. R. Do, “Full down-conversion of amber-emitting phosphor-converted light-emitting diodes with powder phosphors and a long-wave pass filter,” Opt. Express18(11), 11063–11072 (2010). [CrossRef] [PubMed]
  13. J. R. Oh, S.-H. Cho, J. H. Oh, Y.-K. Kim, Y.-H. Lee, W. Kim, and Y. R. Do, “The realization of a whole palette of colors in a green gap by monochromatic phosphor-converted light-emitting diodes,” Opt. Express19(5), 4188–4198 (2011). [CrossRef] [PubMed]
  14. S. Muthu, F. J. P. Schuurmans, and M. D. Pashley, “Red, green and blue LEDs for white light illumination,” IEEE J. Sel. Top. Quantum Electron.8(2), 333–338 (2002). [CrossRef]
  15. H.-C. Cheng, L. Rao, and S.-T. Wu, “Color breakup suppression in field-sequential five-primary-color LCDs,” J. Display Technol.6(6), 229–234 (2010). [CrossRef]
  16. J. S. Kim, P. E. Jeon, J. C. Choi, and H. L. Park, “Emission color variation of M2SiO4:Eu2+ (M=Ba, Sr, Ca) phosphors for light-emitting diode,” Solid State Commun.133(3), 187–190 (2005). [CrossRef]
  17. H. Watanabe, H. Wada, K. Seki, M. Itou, and N. Kijima, “Synthetic method and luminescence properties of SrxCa1-xAlSiN3:Eu2+ mixed nitride phosphors,” J. Electrochem. Soc.155(3), F31–F36 (2008). [CrossRef]
  18. P. F. Smet, A. B. Parmentier, and D. Poelman, “Selecting conversion phosphors for white light-emitting diodes,” J. Electrochem. Soc.158(6), R37–R54 (2011). [CrossRef]
  19. J. H. Oh, J. R. Oh, H. K. Park, Y.-G. Sung, and Y. R. Do, “New paradigm of multi-chip white LEDs: combination of an InGaN blue LED and full down-converted phosphor-converted LEDs,” Opt. Express19(S3Suppl 3), A270–A279 (2011). [CrossRef] [PubMed]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited