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Journal of Display Technology

Journal of Display Technology


  • Vol. 10, Iss. 7 — Jul. 1, 2014
  • pp: 548–552

Inverted Hybrid Inorganic–Organic Light-Emitting Diodes With Balanced Charge Injection

X. A. Cao, R. Acharya, and X. M. Li

Journal of Display Technology, Vol. 10, Issue 7, pp. 548-552 (2014)

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Green phosphorescent inverted hybrid inorganic-organic light-emitting diodes (IHyLEDs) based on a simplified organic layer/ ${{WO}}_{3}$ structure have been demonstrated. The ${{WO}}_{3}$ layer enabled facile hole injection and transport, which was balanced by efficient electron injection from the indium-tin-oxide (ITO) cathode overcoated with nanometer-thick Ca. The IHyLEDs had a turn-on voltage of 6 V. At 20 ${{mA}}/{{cm}}^{2}$ , it reached a luminance of 8133 ${{cd}}/{{m}} ^{2}$ and a current efficiency of 40 cd/A, which were 43% higher than a similar IHyLED with a conventional Al/LiF electron injection layer. The IHyLEDs with Ca also exhibited improved reliability under constant-current stressing at 20 ${{mA}}/{{cm}}^{2}$ .

© 2014 IEEE

X. A. Cao, R. Acharya, and X. M. Li, "Inverted Hybrid Inorganic–Organic Light-Emitting Diodes With Balanced Charge Injection," J. Display Technol. 10, 548-552 (2014)

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  1. C. C. Wu, C. W. Chen, C. L. Lin, C. J. Yang, "Advanced organic light-emitting devices for enhancing display performances," J. Display Technol. 1, 248-266 (2005).
  2. G. Gu, S. R. Forrest, "Design of flat-panel displays based on organic light-emitting devices," IEEE J. Sel. Topics Quantum Electron. 4, 83-99 (1998).
  3. M. H. Lee, S. M. Seop, J. S. Kim, J. H. Hwang, H. J. Shin, S. K. Cho, K. W. Min, W. K. Kwak, S. I. Jung, C. S. Kim, W. S. Choi, S. C. Kim, E. J. Yoo, "Development of 31-inch full-HD AMOLED TV using LTPS-TFT and RGB FMM," SID Symp. Dig. Tech. Papers (2009) pp. 802-804.
  4. 1M. Stewart, R. S. Howell, L. Pires, M. K. Hatalis, "Polysilicon TFT technology for active matrix OLED displays," IEEE Trans. Electron Devices 48, 845-851 (2001).
  5. P. Servati, S. Prakash, A. Nathan, C. Py, "Amorphous silicon driver circuits for OLED displays," J. Vac. Sci. Technol. A 20, 1374-1378 (2002).
  6. K. Nomura, H. Ohta, A. Takagi, T. Kamiya, M. Hirano, H. Hosono, "Room-temperature fabrication of transparent flexible thin-film transistors using amorphous oxide semiconductors," Nature 432, 488-492 (2004).
  7. T. Y. Chu, J. F. Chen, S. Y. Chen, C. J. Chen, C. H. Chen, "Highly efficient and stable inverted bottom-emission organic light emitting devices," Appl. Phys. Lett. 89, 053503 (2006).
  8. Y. Lee, J. Kim, S. Kwon, C. K. Min, Y. Yi, J. W. Kim, B. Koo, M. Hong, "Interface studies of Aluminum, 8-hydroxyquinolatolithium (Liq) and ${{Alq}}_{3}$ for inverted OLED application," Organic Electron. 9, 407-412 (2008).
  9. X. W. Zhang, H. P. Lin, J. Li, L. Zhang, B. Wei, X. Y. Jiang, Z. L. Zhang, "A very simple method of constructing efficient inverted top-emitting organic light-emitting diode based on Ag/Al bilayer reflective cathode," J. Luminesc. 132, 1-5 (2012).
  10. H. J. Bolink, E. Coronado, D. Repetto, M. Sessolo, E. M. Barea, J. Bisquert, G. Garcia-Belmonte, J. Prochazka, L. Kavan, "Inverted solution processable OLEDs using a metal oxide as an electron injection contact," Adv. Funct. Mater. 18, 145-150 (2008).
  11. H. Lee, I. Park, J. Kwak, D. Y. Yoon, C. Lee, "Improvement of electron injection in inverted bottom-emission blue phosphorescent organic light emitting diodes using zinc oxide nanoparticles," Appl. Phys. Lett. 96, 153306 (2010).
  12. M. Thomschke, M. Furno, B. Luessem, K. Leo, "Highly efficient inverted top-emitting organic electroluminescent devices with doped charge transport layers," Proc. SPIE (2010) pp. 77220R.
  13. X. A. Cao, Y. Q. Zhang, "Performance enhancement of organic light-emitting diodes by chlorine plasma treatment of indium tin oxide," Appl. Phys. Lett. 100, 183304 (2012).
  14. R. Acharya, X. A. Cao, "High-brightness organic light-emitting diodes based on a simplified hybrid structure," Appl. Phys. Lett. 101, 053306 (2012).
  15. R. Acharya, X. A. Cao, "Improving the performance of a hybrid inorganic-organic light-emitting diode through structure optimization," IEEE/OSA J. Display Technol. 9, 942-946 (2013).
  16. L. S. Hung, C. W. Tang, M. G. Mason, "Enhanced electron injection in organic electroluminescence devices using an Al/LiF electrode," Appl. Phys. Lett. 70, 152-154 (1997).
  17. S. E. Shaheen, G. E. Jabbour, M. M. Morrell, Y. Kawabe, B. Kippelen, N. Peyghambarian, M. F. Nabor, R. Schlaf, E. A. Mash, N. R. Armstrong, "Bright blue organic light-emitting diode with improved color purity using a LiF/Al cathode," J. Appl. Phys. 84, 23242327 (1998).

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