Schottky contact on a ZnO (0001) single crystal with conducting polymer

Masaki Nakano, A. Tsukazaki, R. Y. Gunji, K. Ueno, A. Ohtomo, T. Fukumura, M. Kawasaki

Research output: Contribution to journalArticle

112 Citations (Scopus)

Abstract

High quality Schottky junctions were fabricated on a ZnO (0001) bulk single crystal by spin coating a commercial conducting polymer, poly(3,4- ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS), as the metal electrodes. The junctions exhibited excellent rectifying behavior with a typical ideality factor of 1.2. Such parameters as Schottky barrier height (φb) and built-in potential (Vbi) show negligible variation among junctions. The electron affinity of ZnO derived from φb and q Vbi values show a slight deviation (∼0.2 eV), suggesting the existence of spontaneously formed interfacial dipole layer between ZnO (0001) polar surface and anionic PSS molecules.

Original languageEnglish
Article number142113
JournalApplied Physics Letters
Volume91
Issue number14
DOIs
Publication statusPublished - 2007 Oct 11

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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