Novel Organic Composites Based on N-Substituted Quinacridone Derivatives for Molecular Organic Light-Emitting Diodes

  • Hideyuki Murata
  • Charles D. Merritt
  • Zakya H. Kafafi


Molecular organic light emitting diodes (MOLEDs) where the active emitting layer has been doped with quinacridones (DHQ), ethyl (DEQ) and benzyl (DBQ) N-substituted quinacridones have been fabricated by high vacuum vapor deposition. These very bright and highly efficient MOLEDs are compared in terms of optimum dopant concentration, spectral characteristics and device efficiencies. DHQ, DEQ and DBQ aggregates formed by plane to plane stacking seem to be responsible for luminescence quenching observed at high dopant concentration. Intermolecular hydrogen bonding between the N-H moiety and the carbonyl oxygen does not play a major role in the quenching process for DHQ-doped AlQ3 composites.


Composite Film Dopant Concentration Guest Molecule Intermolecular Hydrogen Bonding Carbonyl Oxygen 
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  1. 1.
    T. Tsutsui, MRS Bull. 22:39 (1997) and references therein.Google Scholar
  2. 2.
    T. Wakimoto, R. Murayama, K. Nagayama, Y. Okuda and H. Nakada, Appl. Surf. Sci. 114:698 (1997).CrossRefGoogle Scholar
  3. 3.
    T. Wakimoto in Organic Electroluminescent Materials and Devices, edited by S. Miyata and H. Nalwa, p. 289 (1997).Google Scholar
  4. 4.
    J. Shi and C. W. Tang, Appl. Phys. Lett. 70:1665 (1997).CrossRefGoogle Scholar
  5. 5.
    F. H. Chung and R. W. Scott, J. Appl. Cryst. 4:506 (1971).CrossRefGoogle Scholar
  6. 6.
    J. Kalinowski, W. Stampor, P. Di Marco and V. Fattori, Chem. Phys. 182:341 (1994).CrossRefGoogle Scholar
  7. 7.
    I.B. Berlman Fluorescence Spectra of Aromatic Molecules, second edition (Academic Press, New York, 1971).Google Scholar
  8. 8.
    C. Merritt, G. W. Scott, A. Gupta and A. Yavrouian, Chem. Phys. Lett. 69:169 (1980).CrossRefGoogle Scholar
  9. 9.
    G. M. Daly, H. Murata, C. D. Merritt, M. Miller, and Z. H. Kafafi, Proceedings SPIE, 3148:393 (1997).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • Hideyuki Murata
    • 1
  • Charles D. Merritt
    • 1
  • Zakya H. Kafafi
    • 1
  1. 1.U.S. Naval Research LaboratoryUSA

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