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Two-color-mixed white organic light-emitting diodes with a high color temperature

  • Received : 2010.10.25
  • Accepted : 2010.11.25
  • Published : 2011.03.31
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Abstract

Efficient two-color-mixed white organic light-emitting diodes are presented herein by employing a sky-blue phosphorescent dopant of iridium(III)bis[4,6-(difluorophenyl)-pyridinato-N,$C^{2'}$]picolinate (FIrpic) and an orange phosphorescent dopant of bis(2-phenylquinoline)(acetylacetonate)iridium(III) ($Ir(phq)_2$acac) on the emissive layer. Very stable color variation under ${\Delta}$0.02 until a 5000 cd/$m^2$ brightness value was realized by efficient carrier control in a multi-stacked emitting layer of blue/red/blue colors. Maximum current and power efficiencies of 23.8 cd/A and 22.9 lm/W in the forward direction were obtained. With balanced emission from the two emitters, the white-light emission of high correlated color temperature of 7308K and the Commission Internationale de I'Eclairage coordinates of (0.30, 0.33) were achieved.

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References

  1. J.Y. Lee, J.H. Kwon, and H.K. Chung, Org. Electron. 4, 143 (2003). https://doi.org/10.1016/j.orgel.2003.08.013
  2. J. Kido, K. Hongawa, K. Okuyama, and K. Nagai, Appl. Phys. Lett. 64, 185 (1994).
  3. W. D'Andrade, R.J. Holmes, and S.R. Forrest, Adv. Mater. 16, 624 (2004). https://doi.org/10.1002/adma.200306670
  4. C.H. Chuen and Y.T. Tao, Appl. Phys. Lett. 81, 4499 (2002). https://doi.org/10.1063/1.1528736
  5. Y. Shao and Y. Yang, Appl. Phys. Lett. 86, 073510 (2005). https://doi.org/10.1063/1.1866216
  6. Y.H. Niu, M.S. Liu, J.W. Ka, J. Bardeker, M.T. Zin, R. Schofield, Y. Chi, and A.K.-Y. Jen, Adv. Mater. 19, 300 (2007). https://doi.org/10.1002/adma.200502769
  7. H. Kanno, R.J. Holmes, Y. Sun, S. Kena-Cohen, and S.R. Forrest, Adv. Mater. 18, 339 (2006). https://doi.org/10.1002/adma.200501915
  8. F. Guo and D. Ma, Appl. Phys. Lett. 87, 173510 (2005). https://doi.org/10.1063/1.2120898
  9. C.C. Chang, J.F. Chen, S.W. Hwang, and C.H. Chen, Appl. Phys. Lett. 87, 253501 (2005). https://doi.org/10.1063/1.2147730
  10. B.C. Krummacher, V.-E. Choong, M.K. Mathai, S.A. Choulis, F. So, F. Jermann, T. Fiedler, and M. Zachau, Appl. Phys. Lett. 88, 113506 (2006). https://doi.org/10.1063/1.2186080
  11. 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
  12. Y.Z. Wang, R.G. Sun, F. Meghdadi, G. Leising, and A.J. Epstein, Appl. Phys. Lett. 74, 3613 (1999). https://doi.org/10.1063/1.123198
  13. C.-H. Kim and J. Shinar, Appl. Phys. Lett. 80, 2201 (2002). https://doi.org/10.1063/1.1464223
  14. K.O. Cheon and J. Shinar, Appl. Phys. Lett. 81, 1738 (2002). https://doi.org/10.1063/1.1498500
  15. G. Lei, L. Wang, and Y. Qiu, Appl. Phys. Lett. 88, 103508 (2006). https://doi.org/10.1063/1.2185255
  16. X.M. Yu, H.S. Kwok, W.Y. Wong, and G.J. Zhou, Chem. Mater. 18, 5097 (2006). https://doi.org/10.1021/cm061030p
  17. G. Schwartz, S. Reineke, T.C. Rosenow, K. Walzer, and K. Leo, Adv. Funct. Mater. 19, 1319 (2009). https://doi.org/10.1002/adfm.200801503
  18. S. Reinke, F. Lindner, G. Schwartz, N. Seidler, K. Walzer, B. Lussem, and K. Leo, Nature 459, 234 (2009). https://doi.org/10.1038/nature08003
  19. Y. Duan, M. Mazzeo, V. Maiorano, F. Mariano, D. Qin, R. Cingolani, and G. Gigli, Appl. Phys. Lett. 92, 113304 (2008). https://doi.org/10.1063/1.2898401
  20. J. Huang, J. Huang, M. Pfeiffer, A.Werner, J. Blochwitz, K. Leo, and S. Liu, Appl. Phys. Lett. 80, 139 (2002). https://doi.org/10.1063/1.1432110
  21. H. Kanno, Y. Sun, and S.R. Forrestet, Appl. Phys. Lett. 86, 263 (2005).
  22. W.S. Jeon, T.J. Park, S.Y. Kim, R. Pode, J. Jang, and J.H. Kwon, Org. Electron. 10, 240 (2009). https://doi.org/10.1016/j.orgel.2008.11.012
  23. D. Tanaka, T. Takeda, T. Chiba, S. Watanabe, and J. Kido, Chem. Lett. 36, 262 (2007). https://doi.org/10.1246/cl.2007.262
  24. S.J. Su, T. Chiba, T. Takeda, and J. Kido, Adv. Mater. 20, 2125 (2008). https://doi.org/10.1002/adma.200701730

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