Journal of Information Display

The Korean Infomation Display Society (한국정보디스플레이학회)
권호 표지

Highly Efficient Simple-Structure Red Phosphorescent OLEDs with an Extremely Low Doping Technology

  • Jeon, Woo-Sik (Department of Information Display, Kyung Hee University) ;
  • Park, Tae-Jin (Department of Information Display, Kyung Hee University) ;
  • Kwon, Jang-Hyuk (Department of Information Display, Kyung Hee University)
  • Published : 2009.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

Highly efficient red phosphorescent OLEDs (PHOLEDs) with a simple, organic, triple-layer structure was developed using the narrow-bandgap fluorescent host material bis(10-hydroxybenzo[h] quinolinato)beryllium complex (Bebq2) and the deep-red dopant tris(1-phenylisoquinoline)iridium (Ir(piq)3). The maximum current and power efficiency values of 12.71 cd/A and 16.02 lm/W, respectively, with an extremely low doping technology of 1%, are demonstrated herein. The results reveal a practical, cost-saving host dopant system for the fabrication of highly efficient PHOLEDs involving the simple structure presented herein, with a reduction of expensive Ir dopants.

Keywords

References

  1. X. Gong, J.C.Ostrowski, D. Moses, G.C. Bazan, and A.J. Heeger, App. Phys. Lett. 81, 3711 (2002) https://doi.org/10.1063/1.1511283
  2. T. Tsuzuki, N. Shirasawa, T. Suzuki, and S. Tokito, Adv. Mater. 15, 1455 (2003) https://doi.org/10.1002/adma.200305034
  3. C. Adachi, M.A. Baldo, S.R. Forrest, and M.E. Thompson, App. Phys. Lett. 77, 904 (2000) https://doi.org/10.1063/1.1306639
  4. M.A. Baldo, S. Lamansky, P.E. Burrows, M.E. Thompson, and S. R. Forrest, App. Phys. Lett. 75, 4 (1999) https://doi.org/10.1063/1.124258
  5. C. Adachi, M.A. Baldo, M.E. Thompson, and S.R. Forrest, J App. Phys. 90, 5045 (2001)
  6. X. Gong, J.C. Ostrowski, D. Moses, G.C. Bazan, and A.J. Heeger, Adv. Funct. Mater. 13, 439 (2003) https://doi.org/10.1002/adfm.200304334
  7. G. Ramos-Ortiz, Y. Oki, B. Domercq, and Kippelen, Phys. Chem. Chem. Phys. 4, 4109 (2002) https://doi.org/10.1039/b202590f
  8. W. S. Jeon, T. J. Park, S. Y. Kim, R. Pode, , J. Jang, and J. H. Kwon, Organic Electronics 10, 240 (2009) https://doi.org/10.1016/j.orgel.2008.11.012
  9. S. W. Liu, C. A. Huang, J. H. Lee, K. H. Yang, C. C. Chen, and Y. Chang, Thin Solid Films., 453, 312 (2004) https://doi.org/10.1016/j.tsf.2003.11.092
  10. B. D. Chin, M. C. Suh, M. H. Kim, S. T. Lee, H. D. Kim, and H. K. Chung, Appl. Phys. Lett., 86, 133505 (2005) https://doi.org/10.1063/1.1894596
  11. T.-H. Kim, H. K. Lee, O. O. Park, B. D. Chin, S.-H. Lee, and J. K. Kim, Adv. Funct. Mater., 16, 611 (2006) https://doi.org/10.1002/adfm.200500621
  12. T. Tsuboi , W. S. Jeon , and J. H. Kwon, Optical Materials, in press (2009)
  13. T. J. Park, W. S. Jeon, J. J. Park, S. Y. Kim, Y. K. Lee, J. Jang, R. Pode, and J. H. Kwon, Appl. Phys. Lett. 92, 113308 (2008) https://doi.org/10.1063/1.2896641