Polymer Schottky contact on O-polar ZnO with silane coupling agent as surface protective layer

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

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33 Citations (Scopus)

Abstract

We report on a Schottky junction fabricated on O-polar ZnO surfaces with a silane-coupling agent as a protective layer, and a conducting polymer poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as a deep work function metal electrode, simply by using wet processes. The silane-coupling agent prevented the O-polar ZnO surface from an etching reaction in contact with the acidic PEDOT:PSS solution, resulting in a good rectification with a current rectification ratio of 107 at ±1 V. The junction characteristics were systematically controlled in accord with the electron density in ZnO ranging from 8× 1014 to 4× 1016 cm-3.

Original languageEnglish
Article number012104
JournalApplied Physics Letters
Volume93
Issue number1
DOIs
Publication statusPublished - 2008

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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