Journal of Information Display

The Korean Infomation Display Society (한국정보디스플레이학회)
권호 표지
DOI QR코드

DOI QR Code

Solution-processible corrugated structure and scattering layer for enhanced light extraction from organic light-emitting diodes

  • Hyun, Woo Jin (Department of Chemical and Biomolecular Engineering (BK21 Graduate Program), Korea Advanced Institute of Science and Technology) ;
  • Im, Sang Hyuk (KRICT-EPFL Global Research Laboratory, Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Park, O Ok (Department of Chemical and Biomolecular Engineering (BK21 Graduate Program), Korea Advanced Institute of Science and Technology) ;
  • Chin, Byung Doo (Department of Polymer Science and Engineering, Dankook University)
  • Received : 2012.09.11
  • Accepted : 2012.10.08
  • Published : 2012.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

A simple method of fabricating out-coupling structures was demonstrated via solution-processing to enhance light extraction from organic light-emitting diodes (OLEDs). Scattering layers were easily obtained by spin-coating an $SiO_2$ sol solution that contained $TiO_2$ particles. By introducing the scattering layer and the solution-processible corrugated structure as internal and external extraction layers, the OLEDs showed increased external quantum efficiency without a change in the electroluminescence spectrum compared to conventional devices. Using these solution-processible out-coupling structures, nearly all-solution-processed OLEDs with enhanced light extraction could be fabricated. The light extraction enhancement is attributed to the suppression by the out-coupling structures of the light-trapping that arose at the interface of the glass substrate and the air.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea (NRF)

References

  1. B.W. D'Andrade and S.R. Forrest, Appl. Phys. Lett. 83, 3858 (2003). https://doi.org/10.1063/1.1624473
  2. Y. Sun, N.C. Giebink, H. Kanno, B. Ma, M.E. Thompson and S.R. Forrest, Nature 440, 908 (2006). https://doi.org/10.1038/nature04645
  3. G. Gu, D.Z. Garbuzov, P.E. Burrows, S. Venkatesh, S.R. Forrest and M.E. Thompson, Opt. Lett. 22, 396 (1997). https://doi.org/10.1364/OL.22.000396
  4. A. Chutinan, K. Ishihara, T. Asano, M. Fujita and S. Noda, Org. Electron. 6, 3 (2005). https://doi.org/10.1016/j.orgel.2004.12.001
  5. S. Moller and S.R. Forrest, J. Appl. Phys. 91, 3324 (2002). https://doi.org/10.1063/1.1435422
  6. Y. Sun and S.R. Forrest, J. Appl. Phys. 100, 073106 (2006). https://doi.org/10.1063/1.2356904
  7. F. Li, X. Li, J. Zhang and B. Yang, Org. Electron. 8, 635 (2007). https://doi.org/10.1016/j.orgel.2007.06.001
  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, Adv. Mater. 15, 1214 (2003). https://doi.org/10.1002/adma.200304857
  9. U. Geyer, J. Hauss, B. Riedel, S. Gleiss, U. Lemmer and M. Gerken, J. Appl. Phys. 104, 093111 (2008). https://doi.org/10.1063/1.3014034
  10. W.J. Hyun, H.K. Lee, S.S. Oh, O. Hess, C.-G. Choi, S.H. Im and O.O. Park, Adv. Mater. 23, 1846 (2011). https://doi.org/10.1002/adma.201004660
  11. W.H. Koo, S.M. Jeong, F. Araoka, K. Ishikawa, S. Nishimura, T. Toyooka and H. Takezoe, Nat. Photonics 4, 222 (2010). https://doi.org/10.1038/nphoton.2010.7
  12. Y. Sun and S. R. Forrest, Nat. Photonics 2, 483 (2008). https://doi.org/10.1038/nphoton.2008.132
  13. Y. Sun and S. R. Forrest, J. Appl. Phys. 100, 073106 (2006). https://doi.org/10.1063/1.2356904
  14. K. Ishihara, M Fujita, I. Matsubara, T. Asano, S. Noda, H. Ohata, A. Hirasawa, H. Nakada and N. Shimoji, Appl. Phys. Lett. 90, 111114 (2007). https://doi.org/10.1063/1.2713237
  15. S. Jeon, J.-W. Kang, H.-D. Park, J.-J. Kim, J. R. Youn, J. Shim, D.-G. Choi, K.-D. Kim, A.O. Altun, S.-H. Kim and Y.-H. Lee, Appl. Phys. Lett. 92, 223307 (2008). https://doi.org/10.1063/1.2939554
  16. W.J. Hyun, S.H. Im, O.O. Park and B.D. Chin, Org. Electron. 13, 579 (2012). https://doi.org/10.1016/j.orgel.2012.01.001
  17. K.H. Park, S.H. Im, and O.O. Park, Nanotechnology 22, 045602 (2011). https://doi.org/10.1088/0957-4484/22/4/045602
  18. D.H. Wang, S.H. Im, H.K. Lee, O.O. Park and J.H. Park, J. Phys. Chem. C 113, 17268 (2009). https://doi.org/10.1021/jp9060939

Cited by

  1. Synthesis and characterization of red phosphorescent iridium(Ⅲ) complexes based on electron-acceptor modulation of main ligand for high efficiency organic light-emitting diodes vol.636, pp.1, 2012, https://doi.org/10.1080/15421406.2016.1200941