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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 5 — Feb. 28, 2011
  • pp: 4188–4198

The realization of a whole palette of colors in a green gap by monochromatic phosphor-converted light-emitting diodes

Jeong Rok Oh, Sang-Hwan Cho, Ji Hye Oh, Yong-Kyo Kim, Yong-Hee Lee, Woong Kim, and Young Rag Do  »View Author Affiliations


Optics Express, Vol. 19, Issue 5, pp. 4188-4198 (2011)
http://dx.doi.org/10.1364/OE.19.004188


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Abstract

A variety of efficient green, yellow, and amber monochromatic phosphor-converted light-emitting diodes (pc-LEDs) were fabricated by simply capping a long-wave pass filter (LWPF) on top of LED packing associated with each corresponding powder phosphor. In this paper, the luminous efficacy and color purity of two green, three yellow, and two amber pc-LEDs were reviewed by comparing the optical properties and current/temperature stability of each LWPF-capped pc-LED. The simple combination of LWPFs and phosphor materials in the pc-LEDs provide a simple means of addressing the low luminous efficacy problem of III-V monochromatic semiconductor LEDs in the various colors of the wavelength range between green and amber (known as the “green gap”). This technique also represents a simple approach to mitigate the sub-linearity problem of the efficacy versus the driving current occurring at a relatively low current in III-V green LEDs (known as “green droop”) to the level of a blue LED. This nano-multilayered filter-capped pc-LED can open further research into developing new color-converting materials (such as powder phosphors, and/or quantum dots) to extend the color palette in the wavelength region of the “green gap” and to improve the efficacy and color purity of color 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:
Optical Devices

History
Original Manuscript: November 5, 2010
Revised Manuscript: January 28, 2011
Manuscript Accepted: January 30, 2011
Published: February 17, 2011

Citation
Jeong Rok Oh, Sang-Hwan Cho, Ji Hye Oh, Yong-Kyo Kim, Yong-Hee Lee, Woong Kim, and Young Rag Do, "The realization of a whole palette of colors in a green gap by monochromatic phosphor-converted light-emitting diodes," Opt. Express 19, 4188-4198 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-5-4188


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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 Photon. Rev. 1(4), 307–333 (2007). [CrossRef]
  2. MM. 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. Disp. Technol. 3(2), 160–175 (2007). [CrossRef]
  3. W. Schnick, “Shine a light with nitrides,” Phys. Status Solidi RRL 3(7-8), A113–A114 (2009). [CrossRef]
  4. D. A. Steigerwald, J. C. Bhat, D. Collins, R. M. Fletcher, M. O. Holcomb, M. J. Ludowise, P. S. Martin, and S. L. Rudaz, “Illumination With Solid State Lighting Technology,” IEEE J. Sel. Top. Quantum Electron. 8(2), 310–320 (2002). [CrossRef]
  5. N. Kimura, K. Sakuma, S. Hirafune, K. Asano, N. Hirosaki, and R.-J. Xie, “Extra high color rendering white light-emitting diode lamps using oxynitride and nitride phosphors excited by blue light-emitting diode,” Appl. Phys. Lett. 90(5), 051109 (2007). [CrossRef]
  6. K. Fujiwara, H. Jimi, and K. Kaneda, “Temperature-dependent droop of electroluminescence efficiency in blue (In,Ga)N quantum-well diodes,” Phys. Status Solidi C 6(S2), S814–S817 (2009). [CrossRef]
  7. M. Funato, M. Ueda, Y. Kawakami, Y. Narukawa, T. Kosugi, M. Takahashi, and T. Mukai, “Blue, Green, and Amber InGaN/GaN Light-Emitting Diodes on Semipolar {1122} GaN Bulk Substrates,” Jpn. J. Appl. Phys. 45(26), L659–L662 (2006). [CrossRef]
  8. R. Mueller-Mach, G. O. Mueller, M. R. Krames, and T. Trottier, “High-Power Phosphor-Converted Light-Emitting Diodes Based on III-Nitrides,” IEEE J. Sel. Top. Quantum Electron. 8(2), 339–345 (2002). [CrossRef]
  9. R. Mueller-Mach, G. O. Mueller, T. A. Trottier, M. R. Krames, A. Kim, and D. A. Steigerwald, “Green phosphor-converted LED,” Proc. SPIE 4776, 131–136 (2002). [CrossRef]
  10. 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. Status Solidi RRL. 3(7-8), 215–217 (2009). [CrossRef]
  11. J. R. Oh, S.-H. Cho, H. K. Park, J. H. Oh, Y.-H. Lee, and Y. Rag, “Full down-conversion of amber-emitting phosphor-converted light-emitting diodes with powder phosphors and a long-wave pass filter,” Opt. Express 18(11), 11063–11072 (2010). [CrossRef] [PubMed]
  12. 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]
  13. Y. R. Do, K.-Y. Ko, S.-H. Na, and Y.-D. Huh, “Luminescence Properties of Potential Sr1−xCaxGa2S4:Eu Green- and Greenish-Yellow-Emitting Phosphors for White LED,” J. Electrochem. Soc. 153(7), H142–H146 (2006). [CrossRef]
  14. Y. Q. Li, A. C. A. Delsing, G. de With, and H. T. Hintzen, “Luminescence Properties of Eu2+-Activated Alkaline-Earth Silicon-Oxynitride MSi2O2-δN2+2/3δ (M = Ca, Sr, Ba): A Promising Class of Novel LED Conversion Phosphors,” Chem. Mater. 17(12), 3242–3248 (2005). [CrossRef]
  15. J. L. Wu, G. Gundiah, and A. K. Cheetham, “Structure–property correlations in Ce-doped garnet phosphors for use in solid state lighting,” Chem. Phys. Lett. 441(4-6), 250–254 (2007). [CrossRef]
  16. J. K. Park, C. H. Kim, S. H. Park, H. D. Park, and S. Y. Choi, “Application of strontium silicate yellow phosphor for white light-emitting diodes,” Appl. Phys. Lett. 84(10), 1647–1649 (2004). [CrossRef]
  17. H. S. Jang, H. Yang, S. W. Kim, J. Y. Han, S.-G. Lee, and D. Y. Jeon, “White Light-Emitting Diodes with Excellent Color Rendering Based on Organically Capped CdSe Quantum Dots and Sr3SiO5:Ce3+,Li+ Phosphors,” Adv. Mater. (Deerfield Beach Fla.) 20(14), 2696–2702 (2008). [CrossRef]
  18. L. Li, T. J. Daou, I. Texier, T. T. Kim Chi, N. Q. Liem, and P. Reiss, “Highly Luminescent CuInS2/ZnS Core/Shell Nanocrystals: Cadmium-Free Quantum Dots for In Vivo Imaging,” Chem. Mater. 21(12), 2422–2429 (2009). [CrossRef]
  19. M. Peter, A. Laubsch, W. Bergbauer, T. Meyer, M. Sabathil, J. Baur, and B. Hahn, “New developments in green LEDs,” Phys. Status Solidi A 206(6), 1125–1129 (2009). [CrossRef]
  20. A. Laubsch, M. Sabathil, W. Bergbauer, M. Strassburg, H. Lugauer, M. Peter, S. Lutgen, N. Linder, K. Streubel, J. Hader, J. V. Moloney, B. Pasenow, and S. W. Koch, “On the origin of IQE-‘droop’ in InGaN LEDs,” Phys. Status Solidi C 6(S2), S913–S916 (2009). [CrossRef]
  21. J. R. Oh, S.-H. Cho, Y.-H. Lee, and Y. R. Do, “Enhanced forward efficiency of Y3Al5O12:Ce3+ phosphor from white light-emitting diodes using blue-pass yellow-reflection filter,” Opt. Express 17(9), 7450–7457 (2009). [CrossRef] [PubMed]
  22. J. R. Oh, S.-H. Cho, Y.-H. Lee, and Y. R. Do, “Lowering Color Temperature of Y3Al5O12:Ce3+ White Light Emitting Diodes Using Reddish Light-Recycling Filter,” Electrochem. Solid-State Lett. 13(1), J5–J7 (2010). [CrossRef]
  23. A. F. Turner and P. W. Baumeister, “Multilayer mirrors with high reflectance over an extended spectral region,” Appl. Opt. 5(1), 69–76 (1966). [CrossRef] [PubMed]
  24. L. Wang, P.-F. Gu, and S.-Z. Jin, “Enhancement of flip-chip white light-emitting diodes with a one-dimensional photonic crystal,” Opt. Lett. 34(3), 301–303 (2009). [CrossRef] [PubMed]
  25. A. Žukauskas, R. Vaicekauskas, F. Ivanauskas, H. Vaitkevičius, and M. S. Shur, “Spectral optimization of phosphor-conversion light-emitting diodes for ultimate color rendering,” Appl. Phys. Lett. 93(5), 051115 (2008). [CrossRef]
  26. R.-J. Xie, N. Hirosaki, M. Mitomo, K. Sakuma, and N. Kimura, “Wavelength-tunable and thermally stable Li-α-sialon:Eu2+ oxynitride phosphors for white light-emitting diodes,” Appl. Phys. Lett. 89(24), 241103 (2006). [CrossRef]
  27. C.-C. Chung and J.-H. Jean, “Synthesis of Ca-α-SiAlON:Eux phosphor powder by carbothermal-reduction-nitridation process,” Mater. Chem. Phys. 123(1), 13–15 (2010). [CrossRef]
  28. S. C. Allen and A. J. Steckl, “ELiXIR—Solid-State Luminaire With Enhanced Light Extraction by Internal Reflection,” J. Disp. Technol. 3(2), 155–159 (2007). [CrossRef]
  29. S. C. Allen and A. J. Steckl, “A nearly ideal phosphor-converted white light-emitting diode,” Appl. Phys. Lett. 92(14), 143309 (2008). [CrossRef]
  30. N. Narendran, Y. Gu, J. P. Freyssinier-Nova, and Y. Zhu, “Extracting phosphor-scattered photons to improve white LED efficiency,” Phys. Status Solidi A 202(6), R60–R62 (2005). [CrossRef]

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