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Bias-voltage-induced decomposition of 2-methyl-1,4-naphthoquinone on Ag/AlOx/Al tunnel junction

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Abstract

Bias-voltage-induced decomposition of 2-methyl-1,4-naphthoquinone (MeNQ) dispersed in polystyrene on an Ag/AlOx/Al tunnel junction is examined using IR reflection absorption spectroscopy. Under no bias voltage, IR bands due to MeNQ decrease only slightly. In contrast, when the Ag electrode is biased to -2.8 eV, which corresponds to the electronic absorption edge of MeNQ, the IR bands of MeNQ are significantly decreased in intensity. Bias voltages of +2.8 eV and ±1.5 eV promote the band-intensity reduction less. These results reveal that hot holes with appropriate energies promote the decomposition of MeNQ on the tunnel junction.

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Authors and Affiliations

  1. Department of Materials Science, Graduate School of Engineering, Tohoku University, Aoba-yama 02, Sendai, 980-8579, Japan

    T. Wadayama, A. Kojim & A. Hatta

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  1. T. Wadayama
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  2. A. Kojim
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  3. A. Hatta
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Correspondence to T. Wadayama.

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PACS

68.47.De; 73.40.Rw; 78.30.-j

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Wadayama, T., Kojim, A. & Hatta, A. Bias-voltage-induced decomposition of 2-methyl-1,4-naphthoquinone on Ag/AlOx/Al tunnel junction. Appl. Phys. A 79, 1891–1894 (2004). https://doi.org/10.1007/s00339-004-2986-2

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  • DOI: https://doi.org/10.1007/s00339-004-2986-2

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