A photoelectron spectroscopy study of tunable charge injection barrier between metal/organic interface

Zheng Xu, Sheng Han Li, Liping Ma, Gang Li, Guanwen Yang, Yang Yang

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Photoelectron spectroscopy has been used to investigate a tunable charge injection barrier at the metal/organic interface. Results in this study show that the morphology of the Al electrode in the indium tin oxide (ITO) LiFAl /pentacene structure plays a critical role. When the sample is biased across ITO and Al electrodes, shifts in the binding energies of certain core-level electrons are observed on the surface of the discontinuous thin Al electrode. In contrast, no such shifts are observed on the thick Al electrode. Further studies indicate that applying a voltage bias changes the energy alignment between the discontinuous thin Al electrode and the pentacene layer deposited on it.
Original languageEnglish
Article number023302
JournalApplied Physics Letters
Issue number2
Publication statusPublished - 14 Jul 2008
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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