Browse > Article

Efficient White Phosphorescent Organic Light-emitting Diodes for Solid-State Lighting Applications Using an Exciton-confining Emissive-Layer Structure  

Lee, Jong-Hee (Convergence Components & Materials Research Laboratory, Electronics and Telecommunications Research Institute)
Lee, Jeong-Ik (Convergence Components & Materials Research Laboratory, Electronics and Telecommunications Research Institute)
Lee, Joo-Won (Convergence Components & Materials Research Laboratory, Electronics and Telecommunications Research Institute)
Lee, Jun-Yeob (Department of Polymer Science and Engineering, Dankook University)
Kang, Dong-Min (School of Materials Science and Engineering and Engineering Research Institute (ERI), Gyeongsang National University)
Yuanc, Wei (School of Materials Science and Engineering and Engineering Research Institute (ERI), Gyeongsang National University)
Kwon, Soon-Ki (School of Materials Science and Engineering and Engineering Research Institute (ERI), Gyeongsang National University)
Chu, Hye-Yong (Convergence Components & Materials Research Laboratory, Electronics and Telecommunications Research Institute)
Publication Information
Journal of Information Display / v.10, no.2, 2009 , pp. 92-95 More about this Journal
Abstract
Highly efficient blue and white phosphorescent organic light-emitting diodes (PHOLEDs) with an exciton-confining structure were investigated in this study. Effective charge confinement was achieved by stacking two emitting layers with different charge-transporting properties, and blue PHOLEDs with a maximum luminance efficiency of 47.9 lm/W were developed by using iridium(III) bis(4,6-(difluorophenyl) pyridinato-N,C2')picolinate (FIrpic) as an electrophosphorescent dopant. Moreover, when the optimized green and red emitting layers were sandwiched between the two stacked blue emitting layers, white PHOLEDs (WOLEDs) with peak external and luminance efficiencies of 19.0% coupling technique.and 54.0 lm/W, respectively, were obtained without the use of any out-coupling technique.
Keywords
organic light-emitting diodes; white phosphorescent; high efficiency; exciton;
Citations & Related Records
연도 인용수 순위
  • Reference
1 G. He, M. Pfeiffer, K. Leo, M. Hofmann, J. Birnstock, R. Pudzich, and J. Salbeck, Appl. Phys. Lett. 85, 3911 (2004)   DOI   ScienceOn
2 J. Lee, J. -I. Lee, J. Y. Lee, and H. Y. Chu, Appl. Phys. Lett. 94, 193305 (2009)   DOI   ScienceOn
3 J. Y. Lee, J. H. Kwon, H. K. Chung, Org. Electron. 4, 143 (2003)   DOI   ScienceOn
4 C. Adachi, R. C. Kwong, P. Djurovich, V. Adamovich, M. A. Baldo, M. E. Thompson, and S. R. Forrest, Appl. Phys. Lett. 79, 2082 (2001)   DOI   ScienceOn
5 R. J. Homes, S. R. Forrest, Y. -J. Tung, R. C. Kwong, J. J. Brown, S. Garon, and M. E. Thompson, Appl. Phys. Lett. 82, 2422 (2003)   DOI   ScienceOn
6 D. M. Kang, J.-W. Kang, S. O. Jung, J. W. Park, S.-H. Lee, H.-D. Park, Y.-H. Kim, S. C. Shin, J.-J. Kim, S.-K. Kwon, Adv. Mater., 20, 2003 (2008)   DOI   ScienceOn
7 Y. -S. Park, J. -W. Kang, D. M. Kang, J. -W. Park, Y. -H. Kim, S. -K. Kwon, and J. -J. Kim, Adv. Mater. 20, 1957 (2008)   DOI   ScienceOn
8 B. W. D'Andrade and S. R. Forrest. Adv. Mater. 16, 1595 (2004)
9 Y. Sun, and S. R. Forrest, Appl. Phys. Lett. 91, 263503 (2007)   DOI   ScienceOn
10 C. Adachi, M. A. Baldo, M. E. Thomposon, and S. R. Forrest, J. Appl. Phys. 90, 5048 (2001)   DOI   ScienceOn
11 RD is phosphorescent red dopant and the detailed information about this proprietary materials is disclosed later
12 Y. Shao, Y. Yang, Appl. Phys. Lett. 86, 073510 (2005)   DOI   ScienceOn
13 J. Lee, J. -I. Lee, K. -I. Song, S. J. Lee, and H. Y. Chu, Appl. Phys. Lett. 92, 203305 (2008)   DOI   ScienceOn
14 S. O. Jeon, K. S. Yook, C. W. Joo, and J. Y. Lee, Appl. Phys. Lett. 94, 013301 (2009)   DOI   ScienceOn
15 M. A. Baldo, D. F. O’Brien, Y. You, Shoustikov, S. Sibley, M. E. Thompson, and S. R. Forrest, Nature, 395, 151 (1998)   DOI   ScienceOn
16 S. -J. Su, E. Gonmori, H. Sasabe, and J. Kido, Adv. Mater. 20, 4189 (2008)
17 K. S. Yook, S. O. Jeon, C. W. Joo, and J. Y. Lee, Appl. Phys. Lett. 93, 113301 (2008)   DOI   ScienceOn
18 J. Lee, J. -I. Lee, K. -I. Song, S. J. Lee, and H. Y. Chu, Appl. Phys. Lett. 92, 133304 (2008)   DOI   ScienceOn