OSA's Digital Library

Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 2 — Jan. 18, 2010
  • pp: 1099–1104

Highly efficient phosphor-converted white organic light-emitting diodes with moderate microcavity and light-recycling filters

Sang-Hwan Cho, Jeong Rok Oh, Hoo Keun Park, Hyoung Kun Kim, Yong-Hee Lee, Jae-Gab Lee, and Young Rag Do  »View Author Affiliations

Optics Express, Vol. 18, Issue 2, pp. 1099-1104 (2010)

View Full Text Article

Enhanced HTML    Acrobat PDF (322 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



We demonstrate the combined effects of a microcavity structure and light-recycling filters (LRFs) on the forward electrical efficiency of phosphor-converted white organic light-emitting diodes (pc-WOLEDs). The introduction of a single pair of low- and high-index layers (SiO2/TiO2) improves the blue emission from blue OLED and the insertion of blue-passing and yellow-reflecting LRFs enhances the forward yellow emission from the YAG:Ce3+ phosphors layers. The enhancement of the luminous efficacy of the forward white emission is 1.92 times that of a conventional pc-WOLED with color coordinates of (0.34, 0.34) and a correlated color temperature of about 4800 K.

© 2010 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

Original Manuscript: November 25, 2009
Revised Manuscript: December 23, 2009
Manuscript Accepted: January 4, 2010
Published: January 8, 2010

Virtual Issues
Focus Issue: Solar Concentrators (2010) Optics Express

Sang-Hwan Cho, Jeong Rok Oh, Hoo Keun Park, Hyoung Kun Kim, Yong-Hee Lee, Jae-Gab Lee, and Young Rag Do, "Highly efficient phosphor-converted white organic light-emitting diodes with moderate microcavity and light-recycling filters," Opt. Express 18, 1099-1104 (2010)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. C. W. Tang, S. A. Van Slyke, and C. H. Chen, “Electroluminescence of doped organic thin films,” J. Appl. Phys. 65(9), 3610–3616 (1989). [CrossRef]
  2. C. Adachi, T. Tsutsui, and S. Saito, “Organic electroluminescent device having a hole conductor as an emitting layer,” Appl. Phys. Lett. 55(15), 1489–1491 (1989). [CrossRef]
  3. S. R. Forrest, M. A. Baldo, and M. E. Thompson, “High-efficiency fluorescent organic light-emitting devices using a phosphorescent sensitizer,” Nature 403(6771), 750–753 (2000). [CrossRef] [PubMed]
  4. 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]
  5. C.-C. Chang, J.-F. Chen, S.-W. Hwang, and C. H. Chen, “Highly efficient white organic electroluminescent devices based on tandem architecture,” Appl. Phys. Lett. 87(25), 253501 (2005). [CrossRef]
  6. A. Misra, P. Kumar, M. N. Kamalasanan, and S. Chandra, “White organic LEDs and their recent advancements,” Semicond. Sci. Technol. 21(7), R35–R47 (2006). [CrossRef]
  7. B. C. Krummacher, V.-E. Choong, M. K. Mathai, S. A. Choulis, F. So, F. Jermann, T. Fiedler, and M. Zachau, “Highly efficient white organic light-emitting diode,” Appl. Phys. Lett. 88(11), 113506–113508 (2006). [CrossRef]
  8. Y. W. Ko, C. H. Chung, J. H. Lee, Y. H. Kim, C. Y. Sohn, B. C. Kim, C. S. Hwang, Y. H. Song, J. Lim, Y. J. Ahn, G. W. Kang, N. Lee, and C. Lee, “Efficient white organic light emission by single emitting layer,” Thin Solid Films 426(1-2), 246–249 (2003). [CrossRef]
  9. G. Parthasarathy, G. Gu, and S. R. Forrest, “A Full-Color Transparent Metal-Free Stacked Organic Light Emitting Device with Simplified Pixel Biasing,” Adv. Mater. 11(11), 907–910 (1999). [CrossRef]
  10. A. Duggal, J. Shiang, C. Heller, and D. Foust, “Organic light-emitting devices for illumination quality white light,” Appl. Phys. Lett. 80(19), 3470–3472 (2002). [CrossRef]
  11. N. Narendran, Y. Gu, J. P. Freyssinier-Nova, and Y. Zhu, “Extracting phosphor-scattered photons to improve white LED efficiency,” Phys. Stat. Solidi A 202(6), R60–R62 (2005). [CrossRef]
  12. S.-H. Cho, Y.-W. Song, J.-G. Lee, Y.-C. Kim, J. H. Lee, J. Ha, J. S. Oh, S. Y. Lee, S. Y. Lee, K. H. Hwang, D. S. Zang, and Y. H. Lee, “Weak-microcavity organic light-emitting diodes with improved light out-coupling,” Opt. Express 16(17), 12632–12639 (2008), http://www.opticsinfobase.org/abstract.cfm?URI=oe-16-17-12632 . [PubMed]
  13. H. K. Kim, S.-H. Cho, J. R. Oh, Y.-H. Lee, J.-H. Lee, J.-G. Lee, S.-K. Kim, Y.-I. Park, J.-W. Park, and Y. R. Do, “Deep blue, efficient, moderate-microcavity organic light-emitting diodes,” Org. Electron. 11(1), 137–145 (2010). [CrossRef]
  14. 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), http://www.opticsinfobase.org/abstract.cfm?URI=oe-17-9-7450 . [CrossRef] [PubMed]
  15. S.-K. Kim, B. Yang, Y. Ma, J.-H. Lee, and J.-W. Park, “Exceedingly efficient deep-blue electroluminescence from new anthracenes obtained using rational molecular design,” J. Mater. Chem. 18(28), 3376–3384 (2008). [CrossRef]
  16. H. A. Macleod, Thin-Film Optical Filters 3rd Edition, Institute of Physics Publishing (2003).
  17. 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]

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.


Fig. 1 Fig. 2 Fig. 3
Fig. 4 Fig. 5

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited