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Energy Express

Energy Express

  • Editor: Christian Seassal
  • Vol. 21, Iss. S2 — Mar. 11, 2013
  • pp: A201–A207

High thermal stability of correlated color temperature using current compensation in hybrid warm white high-voltage LEDs

Kuo-Ju Chen, Hsuan-Ting Kuo, Hsin-Chu Chen, Min-Hsiung Shih, Chao-Hsun Wang, Shih-Hsuan Chien, Sheng Huan Chiu, Chien-Chung Lin, Ching-Jen Pan, and Hao-Chung Kuo  »View Author Affiliations

Optics Express, Vol. 21, Issue S2, pp. A201-A207 (2013)

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This study experimentally and numerically examines the correlated color temperature (CCT) stability issue for hybrid warm white high-voltage light-emitting diodes (HV-LEDs) by using a current compensation method. This method could efficiently maintain the CCT stability factor at approximately 1.0 and yield greater color uniformity with Δ u ' v ' values ranging from 0.017 to 0.003 in CIE 1976 chromaticity coordinates. The simulation results show that the red chip intensity drop is the primary cause of CCT instability in the hybrid warm white system when the temperature increases. Therefore, Furthermore, results indicate that the relative lumen drop improves from 21% to 15% by using a current compensation method.

© 2013 OSA

OCIS Codes
(230.2090) Optical devices : Electro-optical devices
(230.3670) Optical devices : Light-emitting diodes

ToC Category:
Light-Emitting Diodes

Original Manuscript: August 1, 2012
Revised Manuscript: November 15, 2012
Manuscript Accepted: December 31, 2012
Published: January 14, 2013

Kuo-Ju Chen, Hsuan-Ting Kuo, Hsin-Chu Chen, Min-Hsiung Shih, Chao-Hsun Wang, Shih-Hsuan Chien, Sheng Huan Chiu, Chien-Chung Lin, Ching-Jen Pan, and Hao-Chung Kuo, "High thermal stability of correlated color temperature using current compensation in hybrid warm white high-voltage LEDs," Opt. Express 21, A201-A207 (2013)

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  1. E. F. Schubert, J. K. Kim, “Solid-state light sources getting smart,” Science 308(5726), 1274–1278 (2005). [CrossRef] [PubMed]
  2. S. Nakamura, T. Mukai, M. Senoh, “Candela-class high-brightness INGAN/ALGAN double-heterostructure blue-light-emitting diodes,” Appl. Phys. Lett. 64(13), 1687–1689 (1994). [CrossRef]
  3. H. S. Jang, D. Y. Jeon, “Yellow-emitting Sr3SiO5: Ce3+,Li+ phosphor for white-light-emitting diodes and yellow-light-emitting diodes,” Appl. Phys. Lett. 90(4), 041906 (2007). [CrossRef]
  4. S. Pimputkar, J. S. Speck, S. P. DenBaars, S. Nakamura, “Prospects for LED lighting,” Nat. Photonics 3(4), 180–181 (2009). [CrossRef]
  5. Y. S. Tang, S. F. Hu, W. C. Ke, C. C. Lin, N. C. Bagkar, R. S. Liu, “Near-ultraviolet excitable orange-yellow Sr(3)(Al(2)O(5))Cl(2): Eu(2+) phosphor for potential application in light-emitting diodes,” Appl. Phys. Lett. 93(13), 131114 (2008). [CrossRef]
  6. H. C. Chen, K. J. Chen, C. H. Wang, C. C. Lin, C. C. Yeh, H. H. Tsai, M. H. Shih, H. C. Kuo, T. C. Lu, “A novel randomly textured phosphor structure for highly efficient white light-emitting diodes,” Nanoscale Res. Lett. 7(1), 188 (2012). [CrossRef] [PubMed]
  7. W. Im, N. N. Fellows, S. P. DenBaars, R. Seshadri, “La1-x-0.025Ce0.025Sr2+xAl1-xSixO5 solid solutions as tunable yellow phosphors for solid state white lighting,” J. Mater. Chem. 19(9), 1325–1330 (2009). [CrossRef]
  8. W. Im, N. George, J. Kurzman, S. Brinkley, A. Mikhailovsky, J. Hu, B. F. Chmelka, S. P. DenBaars, R. Seshadri, “Efficient and Color-Tunable Oxyfluoride Solid Solution Phosphors for Solid-State White Lighting,” Adv. Mater. (Deerfield Beach Fla.) 23(20), 2300–2305 (2011). [CrossRef]
  9. Y. Zhang, L. Wu, M. Ji, B. Wang, Y. Kong, J. Xu, “Structure and photoluminescence properties of KSr4(BO3)(3):Eu3+ red-emitting phosphor,” Opt. Mater. Express 2(1), 92–102 (2012). [CrossRef]
  10. H. Li, H. K. Yang, B. K. Moon, B. C. Choi, J. H. Jeong, K. Jang, H. S. Lee, S. S. Yi, “Tunable photoluminescence properties of Eu(II)- and Sm(III)-coactivated Ca9Y(PO4)(7) and energy transfer between Eu(II) and Sm(III),” Opt. Mater. Express 2(4), 443–451 (2012). [CrossRef]
  11. S. K. K. Shaat, H. C. Swart, O. M. Ntwaeaborwa, “Synthesis and characterization of white light emitting CaxSr1-xAl2O4:Tb3+,Eu3+ phosphor for solid state lighting,” Opt. Mater. Express 2(7), 962–968 (2012). [CrossRef]
  12. R. M. Farrell, E. C. Young, F. Wu, S. P. DenBaars, J. S. Speck, “Materials and growth issues for high-performance nonpolar and semipolar light-emitting devices,” Semicond. Sci. Technol. 27(2), 024001 (2012). [CrossRef]
  13. H. Zhao, G. Liu, J. Zhang, J. D. Poplawsky, V. Dierolf, N. Tansu, “Approaches for high internal quantum efficiency green InGaN light-emitting diodes with large overlap quantum wells,” Opt. Express 19(S4), A991–A1007 (2011). [CrossRef] [PubMed]
  14. H. Zhao, N. Tansu, “Optical gain characteristics of staggered InGaN quantum wells lasers,” J. Appl. Phys. 107(11), 113110 (2010). [CrossRef]
  15. J. Zhang, N. Tansu, “Improvement in spontaneous emission rates for InGaN quantum wells on ternary InGaN substrate for light-emitting diodes,” J. Appl. Phys. 110(11), 113110 (2011). [CrossRef]
  16. S. H. Park, D. Ahn, J. Park, Y. T. Lee, “Optical Properties of Staggered InGaN/InGaN/GaN Quantum-Well Structures with Ga- and N-Faces,” Jpn. J. Appl. Phys. 50(7), 072101 (2011). [CrossRef]
  17. Y. K. Ee, J. M. Biser, W. Cao, H. M. Chan, R. P. Vinci, N. Tansu, “Metalorganic Vapor Phase Epitaxy of III-Nitride Light-Emitting Diodes on Nanopatterned AGOG Sapphire Substrate by Abbreviated Growth Mode,” IEEE J. Sel. Top. Quantum Electron. 15(4), 1066–1072 (2009). [CrossRef]
  18. Y. Li, S. You, M. Zhu, L. Zhao, W. Hou, T. Detchprohm, Y. Taniguchi, N. Tamura, S. Tanaka, C. Wetzel, “Defect-reduced green GaInN/GaN light-emitting diode on nanopatterned sapphire,” Appl. Phys. Lett. 98(15), 151102 (2011). [CrossRef]
  19. Y. J. Lee, C. H. Chiu, C. C. Ke, P. C. Lin, T. C. Lu, H. C. Kuo, S. C. Wang, “Study of the Excitation Power Dependent Internal Quantum Efficiency in InGaN/GaN LEDs Grown on Patterned Sapphire Substrate,” IEEE J. Sel. Top. Quantum Electron. 15(4), 1137–1143 (2009). [CrossRef]
  20. E. Rangel, E. Matioli, Y. S. Choi, C. Weisbuch, J. S. Speck, E. L. Hu, “Directionality control through selective excitation of low-order guided modes in thin-film InGaN photonic crystal light-emitting diodes,” Appl. Phys. Lett. 98(8), 081104 (2011). [CrossRef]
  21. X. H. Li, R. Song, Y.-K. Ee, P. Kumnorkaew, J. F. Gilchrist, N. Tansu, “Light Extraction Efficiency and Radiation Patterns of III-Nitride Light-Emitting Diodes with Colloidal Microlens Arrays With Various Aspect Ratios,” IEEE Photonics J. 3(3), 489–499 (2011). [CrossRef]
  22. D. S. Meyaard, G. B. Lin, Q. Shan, J. Cho, E. F. Schubert, H. Shim, M. H. Kim, C. Sone, “Asymmetry of carrier transport leading to efficiency droop in GaInN based light-emitting diodes,” Appl. Phys. Lett. 99(25), 251115 (2011). [CrossRef]
  23. H. Zhao, G. Liu, R. A. Arif, N. Tansu, “Current injection efficiency induced efficiency-droop in InGaN quantum well light-emitting diodes,” Solid-State Electron. 54(10), 1119–1124 (2010). [CrossRef]
  24. C. H. Wang, S. P. Chang, P. H. Ku, J. C. Li, Y. P. Lan, C. C. Lin, H. C. Yang, H. C. Kuo, T. C. Lu, S. C. Wang, C. Y. Chang, “Hole transport improvement in InGaN/GaN light-emitting diodes by graded-composition multiple quantum barriers,” Appl. Phys. Lett. 99(17), 171106 (2011). [CrossRef]
  25. C. Sommer, F. P. Wenzl, P. Hartmann, P. Pachler, M. Schweighart, S. Tasch, G. Leising, “Tailoring of the color conversion elements in phosphor-converted high-power LEDs by optical simulations,” IEEE Photon. Technol. Lett. 20(9), 739–741 (2008). [CrossRef]
  26. Y. Shuai, Y. He, N. T. Tran, F. G. Shi, “Angular CCT Uniformity of Phosphor Converted White LEDs: Effects of Phosphor Materials and Packaging Structures,” IEEE Photon. Technol. Lett. 23(3), 137–139 (2011). [CrossRef]
  27. C. Sommer, P. Hartmann, P. Pachler, M. Schweighart, S. Tasch, G. Leising, F. P. Wenzl, “A detailed study on the requirements for angular homogeneity of phosphor converted high power white LED light sources,” Opt. Mater. 31(6), 837–848 (2009). [CrossRef]
  28. Z. Liu, S. Liu, K. Wang, X. Luo, “Optical Analysis of Color Distribution in White LEDs With Various Packaging Methods,” IEEE Photon. Technol. Lett. 20(24), 2027–2029 (2008). [CrossRef]
  29. H. C. Kuo, C. W. Hung, H. C. Chen, K. J. Chen, C. H. Wang, C. W. Sher, C. C. Yeh, C. C. Lin, C. H. Chen, Y. J. Cheng, “Patterned structure of remote phosphor for phosphor-converted white LEDs,” Opt. Express 19(S4), A930–A936 (2011). [CrossRef] [PubMed]
  30. C. H. Wang, D. W. Lin, C. Y. Lee, M. A. Tsai, G. L. Chen, H. T. Kuo, W. H. Hsu, H. C. Kuo, T. C. Lu, S. C. Wang, G. C. Chi, “Efficiency and Droop Improvement in GaN-Based High-Voltage Light-Emitting Diodes,” IEEE Electron Device Lett. 32(8), 1098–1100 (2011). [CrossRef]
  31. Y. H. Won, H. S. Jang, K. W. Cho, Y. S. Song, D. Y. Jeon, H. K. Kwon, “Effect of phosphor geometry on the luminous efficiency of high-power white light-emitting diodes with excellent color rendering property,” Opt. Lett. 34(1), 1–3 (2009). [CrossRef] [PubMed]
  32. S. E. Brinkley, N. Pfaff, K. A. Denault, Z. Zhang, H. T. Hintzen, R. Seshadri, S. Nakamura, S. P. DenBaars, “Robust thermal performance of Sr(2)Si(5)N(8):Eu(2+): An efficient red emitting phosphor for light emitting diode based white lighting,” Appl. Phys. Lett. 99(24), 241106 (2011). [CrossRef]
  33. H. K. Lee, D. H. Lee, Y. M. Song, Y. T. Lee, J. S. Yu, “Thermal measurements and analysis of AlGaInP/GaInP MQW red LEDs with different chip sizes and substrate thicknesses,” Solid-State Electron. 56(1), 79–84 (2011). [CrossRef]
  34. D. P. Bour, D. W. Treat, R. L. Thornton, R. S. Geels, D. F. Welch, “Drift leakage current in AlGAInP quantum-well lasers,” IEEE J. Quantum Electron. 29(5), 1337–1343 (1993). [CrossRef]
  35. N. T. Tran, F. G. Shi, “Studies of Phosphor Concentration and Thickness for Phosphor-Based White Light-Emitting-Diodes,” J. Lightwave Technol. 26(21), 3556–3559 (2008). [CrossRef]

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