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)

Abstract

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
Volume17
Issue number3
DOIs
Publication statusPublished - 1 Jul 2005
Externally publishedYes

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