Skip to main content
SpringerLink
Log in

Singlet Exciton Quenching by Radical Cations of Aromatic Diamines as an Electron Donor in Organic Electroluminescent Devices

  • Published:
MRS Online Proceedings Library Aims and scope

Abstract

In this study, we report the luminescence quenching by radical cations of aromatic diamines used as a hole transport layer (HTL) in organic electroluminescent (EL) devices. The EL characteristics of green organic EL devices with an electron transport layer (ETL) as an emitter i.e. ITO/TPD HTL/Alq3 ETL/Al is studied. Here, ITO, TPD, and Alq3 are abbreviations for indium-tin-oxide, N,N’-diphenyl-N,N’-bis(3-methylphenyl)-1,1’-biphenyl-4,4’-diamine, and tris (8-hydroxyquinoline) aluminum, respectively. UV-visible absorption and electrochemical data indicate the formation of radical cations in thin film and solution of TPD after chemical oxidation. We find that the EL luminance increases less than linearly with an increase in current for the EL devices studied in this study. The luminance loss in the devices is attributed to quenching of singlet excited states by large excess radical cations of TPD are accumulated in the emission zone due to large overlap between a flourescence spectrum of Alq3 and an absorption spectrum of radical cations of TPD.

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.

Similar content being viewed by others

References

  1. M. Pope, H. P. Kallmann, and P. Magnante, J. Chem. Phys. 38, 2042 (1963).

    Article  CAS  Google Scholar 

  2. W. Helfrich and W. G. Schneider, Phys. Rev. Lett. 14, 229 (1965).

    Article  CAS  Google Scholar 

  3. W. Helfrich and W. G. Schneider, J. Chem. Phys. 44, 2902 (1966).

    Article  CAS  Google Scholar 

  4. W. Tang and S. A. VanSlyke, Appl. Phys. Lett. 51, 913 (1987).

    Article  CAS  Google Scholar 

  5. M. Fujihira and C. Ganzorig, “Molecular Control of Electron and Hole Injection at Electrodes and at Organic Layer Interfaces in Organic Electroluminescent Devices” in Conjugated Polymer and Molecular Interfaces, edited by A. Kahn, J. J. Pireaux, W. R. Salaneck and K. Seki, (Marcel Dekker, New York, 2002) pp. 817–858.

    Google Scholar 

  6. C. Ganzorig and M. Fujihira, Appl. Phys. Lett. 81, 3137 (2002).

    Article  CAS  Google Scholar 

  7. C. Ganzorig and M. Fujihira, Mat. Res. Soc. Symp. Proc. 771, 105 (2003).

    Article  CAS  Google Scholar 

  8. M. Fujihira and C. Ganzorig, “Study of Hole Injection in Hole-Only Single-Layer Devices,” in Multifunctional Conducting Molecular Materials, edited by G. Saito, F. Wudl, R. C. Haddon, K. Tanigaki, T. Enoki, H. E. Katz, and M. Maesato (RSC, Royal Society of Chemistry, Cambridge, 2007) pp. 253–269.

    Google Scholar 

  9. C. Ganzorig and M. Fujihira, Appl. Phys. Lett. 77, 4211 (2000).

    Article  CAS  Google Scholar 

  10. C. Ganzorig, K. Suga, and M. Fujihira, Chem. Lett. 29, 1032 (2000).

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Center for Nanoscience and Nanotechnology and Department of Chemical Technology, School of Chemistry and Chemical Engineering, National University of Mongolia, Ulaanbaatar, Mongolia

    Munkhbat Battulga, Gendensuren Bolormaa, Batjargal Naranbileg & Chimed Ganzorig

Authors
  1. Munkhbat Battulga
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Gendensuren Bolormaa
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Batjargal Naranbileg
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Chimed Ganzorig
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Battulga, M., Bolormaa, G., Naranbileg, B. et al. Singlet Exciton Quenching by Radical Cations of Aromatic Diamines as an Electron Donor in Organic Electroluminescent Devices. MRS Online Proceedings Library 1286, 316 (2010). https://doi.org/10.1557/opl.2011.7

Download citation

  • Published:

  • DOI: https://doi.org/10.1557/opl.2011.7

Search

Navigation