The effect of oxygen exposure on pentacene electronic structure

A. Vollmer*, O. D. Jurchescu, I. Arfaoui, I. Salzmann, T. T.M. Palstra, P. Rudolf, J. Niemax, J. Pflaum, J. P. Rabe, N. Koch

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    102 Citations (Scopus)


    We use ultraviolet photoelectron spectroscopy to investigate the effect of oxygen and air exposure on the electronic structure of pentacene single crystals and thin films. It is found that O2 and water do not react noticeably with pentacene, whereas singlet oxygen/ozone readily oxidize the organic compound. Also, we obtain no evidence for considerable p-type doping of pentacene by O2 at low pressure. However, oxygen exposure lowers the hole injection barrier at the interface between Au and pentacene by 0.25 eV, presumably due to a modification of the Au surface properties.

    Original languageEnglish
    Pages (from-to)339-343
    Number of pages5
    JournalEuropean physical journal E. Soft Matter
    Issue number3
    Publication statusPublished - 1 Jul 2005

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