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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 21 — Jul. 20, 2010
  • pp: 4024–4028

Solution-processed photonic crystals to enhance the light outcoupling efficiency of organic light-emitting diodes

Hwan-Hee Cho, Boik Park, Hyong-Jun Kim, Sohee Jeon, Jun-ho Jeong, and Jang-Joo Kim  »View Author Affiliations

Applied Optics, Vol. 49, Issue 21, pp. 4024-4028 (2010)

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We report an effective solution process to fabricate planarized photonic crystal substrates to enhance the outcoupling efficiency of organic light-emitting diodes (OLEDs). The photonic crystal structure was fabricated using nanoimprint lithography using a UV-curable acrylate and was planarized by using a ZnO layer formed by the solgel process. The solgel process resulted in a smooth surface, and OLEDs have been successfully integrated on the planarized photonic crystal layer with a low leakage current. The resulting light outcoupling efficiency was enhanced by 38% compared with that of conventional OLEDs, which is well matched with a theoretical prediction.

© 2010 Optical Society of America

OCIS Codes
(160.6060) Materials : Solgel
(230.3670) Optical devices : Light-emitting diodes
(110.4235) Imaging systems : Nanolithography
(160.5298) Materials : Photonic crystals

ToC Category:

Original Manuscript: March 19, 2010
Revised Manuscript: May 13, 2010
Manuscript Accepted: May 28, 2010
Published: July 15, 2010

Hwan-Hee Cho, Boik Park, Hyong-Jun Kim, Sohee Jeon, Jun-ho Jeong, and Jang-Joo Kim, "Solution-processed photonic crystals to enhance the light outcoupling efficiency of organic light-emitting diodes," Appl. Opt. 49, 4024-4028 (2010)

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  1. I. Schnitzer, E. Yablonovitch, C. Caneau, T. J. Gmitter, and A. Scherer, “30% external quantum efficiency from surface textured, thin-film light-emitting diodes,” Appl. Phys. Lett. 63, 2174–2176 (1993). [CrossRef]
  2. 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]
  3. S. Moller and S. R. Forrest, “Improved light out-coupling in organic light emitting diodes employing ordered microlens arrays,” J. Appl. Phys. 91, 3324–3327 (2002). [CrossRef]
  4. Y.-H. Cheng, J.-L. Wu, C.-H. Cheng, K.-C. Syao, and M.-C. M. Lee, “Enhanced light outcoupling in a thin film by texturing meshed surfaces,” Appl. Phys. Lett. 90, 091102(2007). [CrossRef]
  5. S. M. Jeong, F. Araoka, Y. Machida, K. Ishikawa, H. Takezoe, S. Nishimura, and G. Suzaki, “Enhancement of normally directed light outcoupling from organic light-emitting diodes using nanoimprinted low-refractive-index layer,” Appl. Phys. Lett. 92, 083307 (2008). [CrossRef]
  6. K. Ishihara, M. Fusita, I. Matsubara, T. Asano, S. Noda, H. Ohata, A. Hirasawa, H. Nakada, and N. Shimoji, “Organic light-emitting diodes with photonic crystals on glass substrate fabricated by nanoimprint lithography,” Appl. Phys. Lett. 90, 111114 (2007). [CrossRef]
  7. A. O. Altun, S. Jeon, J. Shim, J.-h. Jeong, D.-G. Choi, K.-D. Kim, J.-H. Choi, S.-W. Lee, E.-S. Lee, H.-D. Park, J. R. Youn, J.-J. Kim, Y.-H. Lee, and J.-W. Kang, “Corrugated organic light emitting diodes for enhanced light extraction,” Org. Electron. 11, 711–716 (2010). [CrossRef]
  8. Y. R. Do, Y.-C. Kim, Y.-W. Song, C.-O. Cho, H. Jeon, Y.-J. Lee, S.-H. Kim, and Y.-H. Lee, “Enhanced light extraction from organic light emitting diodes with 2D SiO2/SiNx photonic crystals,” Adv. Mater. 15, 1214–1218 (2003). [CrossRef]
  9. Y.-J. Lee, S.-H. Kim, J. Huh, G.-H. Kim, Y.-H. Lee, S.-H. Cho, Y.-C. Kim, and Y.-R. Do, “A high-extraction-efficiency nanopatterned organic light-emitting diode,” Appl. Phys. Lett. 82, 3779–3781 (2003). [CrossRef]
  10. S. Jeon, J.-W. Kang, H.-D. Park, J.-J. Kim, Jae R. Youn, J. Shim, J.-h. Jeong, D.-G. Choi, K.-D. Kim, A. O. Altun, S.-H. Kim, and Y.-H. Lee “Ultraviolet nanoimprinted polymer nanostructure for organic light emitting diode application,” Appl. Phys. Lett. 92, 223307 (2008). [CrossRef]
  11. L. L. Hench and J. K. West, “The sol–gel process,” Chem. Rev. 90, 33–72 (1990). [CrossRef]
  12. M. Ohyama, H. Kozuka, and T. Yoko, “Sol-gel preparation of ZnO films with extremely preferred orientation along (002) plane from zinc acetate solution,” Thin Solid Films 306, 78–85(1997). [CrossRef]
  13. R.-C. Perez, O.-J. Sandoval, S.-J. Sandoval, J.-M. Marin, A.-M. Galvan, G.-T. Delgado, and A.-M. Alvarez, “Influence of annealing temperature on the formation and characteristics of sol-gel prepared ZnO films,” J. Vac. Sci. Technol. A 17, 1811–1816 (1999). [CrossRef]

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