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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 11 — Apr. 10, 2008
  • pp: 1947–1955

Luminous power efficiency optimization of a white organic light-emitting diode by tuning its spectrum and its extraction efficiency

Peter Vandersteegen, Gregor Schwartz, Peter Bienstman, and Roel Baets  »View Author Affiliations


Applied Optics, Vol. 47, Issue 11, pp. 1947-1955 (2008)
http://dx.doi.org/10.1364/AO.47.001947


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Abstract

We show an increase of the luminous power efficiency of a white organic light-emitting diode (LED) with three emitters by optimizing its spectrum and its extraction efficiency. To calculate this efficiency we use a model with four parameters: the spectra, extraction efficiencies, internal quantum efficiencies of three emitters, and the driving voltage. This luminous power efficiency increases by 30% by use of a spectrum close to the spectrum of the MacAdam limit. This limit gives the highest luminous efficacy for a given chromaticity. We also show that a white organic LED with an inefficient deep blue emitter can give the same luminous power efficiency as a white organic LED with a more efficient light blue emitter, because of their different fractions in the radiant flux. Tuning the extraction efficiency with a microcavity to the spectrum also increases the luminous power efficiency by 10%.

© 2008 Optical Society of America

OCIS Codes
(250.3680) Optoelectronics : Light-emitting polymers
(330.1715) Vision, color, and visual optics : Color, rendering and metamerism

ToC Category:
Vision, color, and visual optics

History
Original Manuscript: October 8, 2007
Revised Manuscript: January 11, 2008
Manuscript Accepted: January 11, 2008
Published: April 9, 2008

Virtual Issues
Vol. 3, Iss. 5 Virtual Journal for Biomedical Optics

Citation
Peter Vandersteegen, Gregor Schwartz, Peter Bienstman, and Roel Baets, "Luminous power efficiency optimization of a white organic light-emitting diode by tuning its spectrum and its extraction efficiency," Appl. Opt. 47, 1947-1955 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-11-1947


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References

  1. S. R. Forrest, D. C. Bradley, and M. E. Thompson, “Measuring the efficiency of organic light-emitting diodes,” Adv. Mater. 15, 1043-1048 (2003). [CrossRef]
  2. CIE 13.3-1995, “Method of measuring and specifying colour rendering properties of light sources,” ISBN: 3 900 734 57 7.
  3. J. Kido, K. Hongawa, K. Okuyama, and K. Nagai, “White light-emitting organic electroluminescent devices using the poly(N-vinylcarbazole) emitter layer doped with three fluorescent dyes,” Appl. Phys. Lett. 64, 815-817, (1994). [CrossRef]
  4. N. K. Patel, S. Cina, and J. H. Burroughes, “High-efficiency organic light-emitting diodes,” IEEE J. Sel. Top. Quantum Electron. 8, 346-361 (2002). [CrossRef]
  5. S. Tokito, T. Iijima, T. Tsuzuki, and F. Sato, “High-efficiency white phosphorescent organic light-emitting devices with greenish-blue and red-emitting layers,” Appl. Phys. Lett. 83, 2459-2461 (2003). [CrossRef]
  6. B. W. D'Andrade and S. R. Forrest, “White organic light-emitting devices for solid-state lighting,” Adv. Mater. 16 (18), 1585-1595 (2004). [CrossRef]
  7. A. Misra, P. Kumar, M N. Kamalasanan, and S. Chandra, White organic LEDs and their recent advancements,” Semicond. Sci. Technol. 21, R35-R46 (2006). [CrossRef]
  8. D. L. MacAdam, “Maximum attainable luminous efficiency of various chromaticities,”J. Opt. Soc. Am. 40, 120, (1950). [CrossRef]
  9. S.-W. Wen, M.-T. Lee, and C. H. Chen, “Recent development of blue fluorescent OLED materials and devices,” J. Display Technol. 1, 90-99 (2005). [CrossRef]
  10. W. G. Quirino, R. D. Adati, S. A. M. Lima, C. Legnani, M. Jafelicci Jr, M. R. Davolos, and M. Cremona, Electroluminescence of a device based on europium β-diketonate with phosphine oxide complex,”Thin Solid Films 515, 927-931(2006). [CrossRef]
  11. E. Thompson Chihaya Adachi, Marc A. Baldo, and Stephen R. Forrest, “Nearly 100% internal phosphorescence efficiency in an organic light emitting diode.J. Appl. Phys. 90, 5048-5051(2001). [CrossRef]
  12. G. He, M. Pfeiffer, K. Leo, Michael Hofmann, Jan Birnstock, R. Pudzich, and J. Salbeck, “High-efficiency and low-voltage p-i-n electrophosphorescent organic light-emitting diodes with double-emission layers,” Appl. Phys. Lett. 85, 3911-3913 (2004). [CrossRef]
  13. D. Tanaka, Y. Agata, T. Takeda, S. Watanabe, and J. Kido, “High luminous efficiency blue organic light-emitting devices using high triplet excited energy materials,” Jpn. J. Appl. Phys. 46, L117-L119 (2007). [CrossRef]
  14. S. R. Forrest, X. Ren, J. Li, R. J. Holmes, B. W. D'Andrade, and M. E. Thompson, “Efficient, deep-blue organic electrophosphorescence by guest charge trapping,” Appl. Phys. Lett. 83, 3818-3820 (2003). [CrossRef]
  15. C. L. Mulder, K. Celebi, and K. M. Milaninia, “Saturated and efficient blue phosphorescent organic light emitting devices with Lambertian angular emission,” Appl. Phys. Lett. 90, 211109 (2007). [CrossRef]
  16. H. Kanno, N. C. Giebink, Y. Sun, and S. R. Forrest, “Stacked white organic light-emitting devices based on a combination of fluorescent and phosphorescent emitters,” Appl. Phys. Lett. 89, 023503 (2006). [CrossRef]
  17. Gregor Schwartz, Karsten Fehse, Martin Pfeiffer, Karsten Walzer, and Karl Leo, “Highly efficient white organic light emitting diodes comprising an interlayer to separate fluorescent and phosphorescent regions,” Appl. Phys. Lett. 89, 083509 (2006). [CrossRef]
  18. Y. Sun, N. C. Giebink, H. Kanno, B. Ma, M. E. Thompson, and S. R. Forrest, “Management of singlet and triplet excitons for efficient white organic light-emitting devices,”Nature 440, 908-912 (2006). [CrossRef] [PubMed]
  19. Y.-C. Kim, S.-H. Cho, Y.-W. Song, Y.-J. Lee, Y.-H. Lee, and Y. R. Do, Planarized sinx/spin-on-glass photonic crystal organic light-emitting diodes,” Appl. Phys. Lett. 89, 173502 (2006). [CrossRef]
  20. H. Peng, Y. L. HoX.-J. Yu , M. Wong, and H.-S. Kwok, “Coupling efficiency enhancement in organic light-emitting devices using microlens array theory and experiment,” J. Display Technol. 1, 278-282 (2005). [CrossRef]
  21. J. Lim, S. S. Oh, D. Y. Kim, S. H. Cho, I. T. Kim, S. H. Han, H. Takezoe, E. H. Choi, G. S. Cho, Y. H. Seo, S. O. Kang, and B. Park, “Enhanced out-coupling factor of microcavity organic light-emitting devices with irregular microlens array,” Opt. Express 14, 6564-6571 (2006). [CrossRef] [PubMed]
  22. T. Nakamura, N. Tsutsumi, N. Juni, and H. Fujii., “Improvement of coupling-out efficiency in organic electroluminescent devices by addition of a diffusive layer,” J. Appl. Phys. 96, 6016-6024 (2004). [CrossRef]
  23. T. Tsutsui, M. Yahiro, H. Yokogawa, K. Kawano, and M. Yokoyama, “Doubling coupling-out efficiency in organic light-emitting devices using a thin silica aerogel layer,” Adv. Mater. 13, 1149-1152 (2001). [CrossRef]
  24. K. Neyts, “Microcavity effects and the outcoupling of light in displays and lighting applications based on thin emitting films,” Appl. Surf. Sci. 244, 517-523 (2005). [CrossRef]
  25. P. Bienstman and R. Baets, “The RC2 LED: a novel resonant-cavity LED design using a symmetric resonant cavity in the outcoupling reflector,” IEEE J. Quantum Electron. 36, 669-673 (2000). [CrossRef]
  26. A. M. Adawi, L. G. Connolly, D. M. Whittaker, D. G. Lidzey, E. Smith, M. Roberts, F. Qureshi, C. Foden, and N. Athanassopoulou, “Improving the light extraction efficiency of red-emitting conjugated polymer light emitting diodes,” J. Appl. Phys. 99, 054505 (2006). [CrossRef]
  27. M. Pfeiffer, S. R. Forrest, K. Leo, and M. E. Thompson, “Electrophosphorescent p-i-n organic light emitting devices for very high efficiency flat panel displays,” Adv. Mater. 14, 1633-1636(2002). [CrossRef]
  28. R. Meerhiem, K. Walzer, G. He, M. Pfeiffer, and K. Leo, “Highly efficient organic light emitting diodes (OLED) for displays and lighting,” Proc. SPIE 6192, 61920P (2006). [CrossRef]
  29. CIE 15:2004, Colorimetry, 3rd ed. www.cie.co.at.
  30. K. Walzer, B. Maennig, M. Pfeiffer, and K. Leo., “Highly efficient organic devices based on electrically doped transport layers,” Chem. Rev. 107, 1233-1271 (2007). [CrossRef] [PubMed]
  31. CIE 177:2007, “Colour rendering of white LED light sources,” ISBN 978 3 901 906 57 2.
  32. D. Delbeke, R. Bockstaele, P. Bienstman, R. Baets, and H. Benisty, “High-efficiency semiconductor resonant-cavity light-emitting diodes: a review.,” IEEE J.Sel. Top. Quantum Electron. 8, 189-206 (2002). [CrossRef]

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