Photoelectron spectroscopic study on monolayer pentacene thin-film/polar ZnO single-crystal hybrid interface

Takahiro Nagata, Tatsuru Nakamura, Ryoma Hayakawa, Takeshi Yoshimura, Seungjun Oh, Nobuya Hiroshiba, Toyohiro Chikyow, Norifumi Fujimura, Yutaka Wakayama

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Abstract

The polarity effects of ZnO on the electronic state of a monolayer pentacene/ZnO interface were investigated by X-ray photoelectron spectroscopy (XPS). XPS revealed that the Zn-polar ZnO (Zn-ZnO) strongly depleted electrons in pentacene at the interface. The O-polar ZnO showed greater electron transfer from ZnO to pentacene than Zn-ZnO. The surface potential of pentacene on ZnO was larger than that of bulk pentacene regardless of the ZnO polarity. These findings indicate that the polarity of ZnO has the potential to control the electronic state of the organic/ inorganic semiconductor interface.

Original languageEnglish
Article number025702
JournalApplied Physics Express
Volume10
Issue number2
DOIs
Publication statusPublished - 2017 Feb 1
Externally publishedYes

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ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Nagata, T., Nakamura, T., Hayakawa, R., Yoshimura, T., Oh, S., Hiroshiba, N., Chikyow, T., Fujimura, N., & Wakayama, Y. (2017). Photoelectron spectroscopic study on monolayer pentacene thin-film/polar ZnO single-crystal hybrid interface. Applied Physics Express, 10(2), [025702]. https://doi.org/10.7567/APEX.10.025702