Electroabsorption in vacuum-evaporated films of bathocuproine

Authors

  • Waldemar Stampor Gdansk University of Technology
  • A. Tykocki-Piłat Gdansk University of Technology

DOI:

https://doi.org/10.4302/photon.%20lett.%20pl.v3i2.220

Abstract

Electric field modulated absorption (EA) spectra were measured in vacuum evaporated films of bathocuproine (BCP), the phenanthroline derivative commonly used in organic light emitting diodes. The EA spectra are interpreted in terms of the standard Stark spectroscopy analysis using a comparison of the EA spectrum with first and second absorption derivatives. The dipole moment and polarizability changes upon photoexcitation were calculated for the lowest energy singlet excited states in BCP films. The excited states are recognized as Frenkel excitons carrying intramolecular charge transfer (CT) character.

Full text: PDF

References:
  1. J. Kalinowski, Organic Light Emitting Diodes. Principles, Characteristics, and Processes, (New York, M. Dekker 2005).
  2. H. Tang, H. Liao, L. Zhu, "Influences of hole blocking bathocuproine layer on emission of organic light emitting devices", Chem. Phys. Lett. 381, 605 (2003). [CrossRef]
  3. W. Stampor, "Electromodulation of fluorescence in hole-transporting materials for organic light-emitting diodes. Part II: Starburst amines", Chem. Phys. 315, 259 (2007). [CrossRef]
  4. G. Bublitz, S. Boxer, "STARK SPECTROSCOPY: Applications in Chemistry, Biology, and Materials Science", Ann. Rev. Phys. Chem. 48, 213 (1997). [CrossRef]
  5. L. Sebastian, G. Weiser, H. Bässler, "Charge transfer transitions in solid tetracene and pentacene studied by electroabsorption", Chem. Phys. 61, 125 (1981). [CrossRef]
  6. M. Slawik, P. Petelenz, "Theoretical interpretation of the electroabsorption spectra of polyacene crystals. II. Charge-transfer states", J. Chem. Phys. 111, 7576 (1999). [CrossRef]
  7. W. Stampor, "Electroabsorption study of vacuum-evaporated films of Pt(II)octaethylporphyrin", Chem. Phys. 305, 77 (2004). [CrossRef]
  8. W. Stampor, W. Mróz, "Electroabsorption in triphenylamine-based hole-transporting materials for organic light-emitting diodes ", Chem. Phys. 331, 261 (2007). [CrossRef]
  9. W.H. Press, B.P. Flannery, W.T. Vetterling, Numerical Recipes, (Cambridge, Cambridge University Press 1986).
  10. H. Gao et al., "Theoretical Characterization of a Typical Hole/Exciton-Blocking Material Bathocuproine and Its Analogues", J. Phys. Chem. A 112, 9097 (2008). [CrossRef]
  11. J. Wang, J.W. Ye, Y. Wang, "2,9-Dimethyl-4,7-diphenyl-1,10-phenanthroline", Acta Cryst. E 63, o2007 (2007). [CrossRef]

Author Biography

Waldemar Stampor, Gdansk University of Technology

Department of Electronic Phenomena,

Faculty of Applied Physics and Mathematics

Downloads

Published

2011-06-29

How to Cite

[1]
W. Stampor and A. Tykocki-Piłat, “Electroabsorption in vacuum-evaporated films of bathocuproine”, Photonics Lett. Pol., vol. 3, no. 2, pp. pp. 64–66, Jun. 2011.

Issue

Vol. 3 No. 2 (2011)

Section

Articles

License

Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).