Skip to main content
SpringerLink
Log in

Effect of a broad recombination zone with a triple-emitting layer on the efficiency of blue phosphorescent organic light-emitting diodes

  • Published:
Electronic Materials Letters Aims and scope Submit manuscript

Abstract

The device characteristics of blue phosphorescent organic lightemitting diodes (PHOLEDs) with a broad recombination region within emitting layers (EMLs) were investigated by changing the combination and the composition of the host materials. Six types of devices were fabricated with the novel host material 9-(4-(triphenylsilyl)phenyl)-9H-carbazole, hole transport-type host material N,N′-dicarbazolyl-3,5-benzene, and electron transporttype host material 2,2′,2″-(1,3,5-benzenetriyl)tris-[1-phenyl-1H-benzimidazole] as diverse EML structures. Balanced chargecarrier injection and a distributed recombination zone within EMLs were achieved through a triple-emitting layer (T-EML). The properties of a device with a T-EML using a stepwise structure without any mixed host system were found to be superior to the other PHOLEDs. This can be explained in terms of improved charge balance and triplet-exciton confinement within the broad recombination region.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. C. W. Tang and S. A. Van Slyke, Appl. Phys. Lett. 51, 913 (1987).

    Article  Google Scholar 

  2. M. A. Baldo, M. E. Thompson, and S. R. Forrest, Nature 403, 750 (2000).

    Article  Google Scholar 

  3. S. Lamansky, P. Djurovich, D. Murphy, F. Abdel-Razzaq, R. Kwong, I. Tsyba, M. Bortz, B. Mui, R. Bau, and M. E. Thompson, Inorg. Chem. 40, 1704 (2001).

    Article  Google Scholar 

  4. J. H. Seo, I. J. Kim, Y. K. Kim, and Y. S. Kim, Thin Solid Films 516, 3614 (2008).

    Article  Google Scholar 

  5. J. H. Kim, J.-Y. Cho, J. Park, B. K. Lee, K.-H. Baek, H. Lee, and L.-M. Do, Electron. Mater. Lett. 10, 27 (2014).

    Article  Google Scholar 

  6. S. J. Lee, J. R. Koo, H. W. Lee, D. H. Lee, K. H. Lee, S. S. Yoon, J. Park, and Y. K. Kim, Electron. Mater. Lett. 9, 821 (2013).

    Article  Google Scholar 

  7. Y. Tao, Q. Wang, L. Ao, C. Zhong, J. Qin, C. Yang, and D. Ma, J. Mater. Chem. 20, 1759 (2010).

    Article  Google Scholar 

  8. Y. Tao, Q. Wang, C. Yang, J. Qin, and D. Ma, Appl. Mater. Interfaces 2, 2813 (2010).

    Article  Google Scholar 

  9. V. Adamovich, S. R. Cordero, P. I. Djurovich, A. Tamayo, M. E. Thompson, B. Andrade, and S. R. Forrest, Org. Electron. 4, 77 (2003).

    Article  Google Scholar 

  10. S. J. Lee, J. H. Seo, J. R. Koo, H. Shin, W. K. Han, K. H. Lee, S. S. Yoon, and Y. K. Kim, J. Nanosci. Nanotechno. 12, 4154 (2012).

    Article  Google Scholar 

  11. X. Ren, J. Li, R. J. Holmes, P. I. Djurovich, S. R. Forrest, and M. E. Thompson, Chem. Mater. 16, 4743 (2004).

    Article  Google Scholar 

  12. S. Tokito, T. Iijima, T. Tsuzuki, and F. Sato, Appl. Phys. Lett. 83, 2459 (2003).

    Article  Google Scholar 

  13. G. He, M. Pfeiffer, K. Leo, M. Hofmann, J. Birnstock, R. Pudzich, and J. Salbeck, Appl. Phys. Lett. 85, 3911 (2004).

    Article  Google Scholar 

  14. S. Reineke, F. Lindner, G. Schwartz, N. Seidler, K. Walzer, B. Lüssem, and K. Leo, Nature 459, 234 (2009).

    Article  Google Scholar 

  15. R. J. Holmes, S. R. Forrest, Y. J. Tung, R. C. Kwong, J. J. Brown, S. Garon, and M. E. Thompson, Appl. Phys. Lett. 82, 2422 (2003).

    Article  Google Scholar 

  16. C. C. Chi, C. L. Chiang, S. W. Liu, H. Yueh, C. T. Chen, and C. T. Chen, J. Mater. Chem. 19, 5561 (2009).

    Article  Google Scholar 

  17. S. Reineke, K. Walzer, and K. Leo, Phys. Rev. B 75, 125328 (2007).

    Article  Google Scholar 

  18. S. H. Kim, J. Jang, K. S. Yook, and J. Y. Lee, Appl. Phys. Lett. 92, 023513 (2008).

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Information Display, Hongik University, Seoul, 121-791, Korea

    Seok Jae Lee, Ja Ryong Koo, Ho Won Lee, Song Eun Lee, Hyung Jin Yang & Young Kwan Kim

  2. Department of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea

    Seung Soo Yoon

  3. Department of Electronic Engineering, Hallym University, Chuncheon, 200-702, Korea

    Jaehoon Park

Authors
  1. Seok Jae Lee
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Ja Ryong Koo
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Ho Won Lee
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Song Eun Lee
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Hyung Jin Yang
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. Seung Soo Yoon
    View author publications

    You can also search for this author in PubMed Google Scholar

  7. Jaehoon Park
    View author publications

    You can also search for this author in PubMed Google Scholar

  8. Young Kwan Kim
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding authors

Correspondence to Seung Soo Yoon, Jaehoon Park or Young Kwan Kim.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Lee, S.J., Koo, J.R., Lee, H.W. et al. Effect of a broad recombination zone with a triple-emitting layer on the efficiency of blue phosphorescent organic light-emitting diodes. Electron. Mater. Lett. 10, 1127–1131 (2014). https://doi.org/10.1007/s13391-014-4132-4

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s13391-014-4132-4

keywords

Search

Navigation