Hostname: page-component-7479d7b7d-qlrfm Total loading time: 0 Render date: 2024-07-12T07:23:17.687Z Has data issue: false hasContentIssue false
  • English
  • Français

Photo-Electron Spectroscopy Study of Energy Levels in Conjugated Oligomers

Published online by Cambridge University Press:  15 March 2011

S.C. Veenstra ,
A. Heeres ,
U. Stalmach ,
J. Wildeman ,
G. Hadziioannou ,
G.A. Sawatzky  and
H.T. Jonkman
S.C. Veenstra
Affiliation:
Department of Polymer Chemistry, Materials Science Centre, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
A. Heeres
Affiliation:
Laboratory of Solid State and Applied Physics, Materials Science Centre, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
U. Stalmach
Affiliation:
Department of Polymer Chemistry, Materials Science Centre, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
J. Wildeman
Affiliation:
Department of Polymer Chemistry, Materials Science Centre, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
G. Hadziioannou
Affiliation:
Department of Polymer Chemistry, Materials Science Centre, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
G.A. Sawatzky
Affiliation:
Laboratory of Solid State and Applied Physics, Materials Science Centre, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
H.T. Jonkman
Affiliation:
Laboratory of Solid State and Applied Physics, Materials Science Centre, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
Get access

Abstract

We report on the valence orbital structure of poly(para-phenylenevinylene) (PPV)-like oligomers. We studied these molecules as isolated oligomers in the gas phase, as well as in thin films deposited on metal substrates. We use a simple model based on a previously reported Hamiltonian that accurately describes the development of the low lying electronic excitations as a function of the number of repeating units. In the study on the thin organic films we report on the energy level alignment at metal / organic and organic / organic interfaces, where the organic layer is either a PPV-like oligomer or C60. The results are important for understanding organic photovoltaic devices.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 708: Symposium BB – Organic Optoelectronic Materials, Processing and Devices , 2001 , BB2.6
Copyright
Copyright © Materials Research Society 2002

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Brabec, C. J., Sariciftci, N. S., Hummelen, J. C., Adv. Funct. Mater. 11, 15 (2001).Google Scholar
2. Telesca, R., Bolink, H., Yunoki, S., Hadziioannou, G., Duijnen, P.Th. Van, Snijders, J.G., Jonkman, H.T., Sawatzky, G.A., Phys. Rev. B 63, 155112 (2001).Google Scholar
3. Veenstra, S. C., Stalmach, U., Krasnikov, V. V., Hadziioannou, G., Jonkman, H. T., Heeres, A., Sawatzky, G. A.: Appl. Phys. Lett. 76, 2253 (2000).Google Scholar
4. Tian, B., Zerbi, G., Schenk, R., Müllen, K., J. Chem. Phys. 95 3191 (1991); T. Ikeyama, T. Azumi, J. Phys. Chem. 98 2832 (1994).Google Scholar
5. Ishii, H., Sugiyama, K., Ito, E., Seki, K., Adv. Mater. 11, 605 (1999).Google Scholar
6. Hill, I.G., Milliron, D., Schwartz, J., Kahn, A., Appl. Surf. Sci. 166, 354 (2000).Google Scholar
7. Hoogenboom, B., Hesper, R., Tjeng, L., Sawatzky, G., Phys. Rev. B 57 11939 (1998).Google Scholar
8. Lof, R.W., Veenendaal, M.A. van, Koopmans, B., Jonkman, H.T., Sawatzky, G.A., Phys. Rev. Lett. 68, 3924 (1992).Google Scholar
9. Maxwell, A.J., Brühwiler, P.A., Arvanitis, D., Hasselström, J., Johnsson, M.K.J., Mårtensson, N.,Phys. Rev. B 57, 7312 (1998); C.T. Tzeng, W.S. Lo, J.Y. Yuh, R.Y. Chu, K.D. TSuei, Phys. Rev. B 61(3), 2263 (2000).Google Scholar