We show that perforated metal electrode arrays, fabricated using nanosphere lithography, provide a viable alternative to conductive metal oxides as transparent electrode materials. The inter-aperture spacing is tuned by varying etching times in an oxygen plasma, and the effect of inter-aperture “wire” thickness on the optical and electronic properties of perforated silver films is shown. Optical transmission is limited by reflection and surface plasmons, and for these results do not exceed 73%. Electrical sheet resistance is shown to be as low as 3 Ω ◻−1 for thermally evaporated silver films. The performance of organic photovoltaic devices comprised of a P3HT:PCBM bulk heterojunction deposited onto perforated metal arrays is shown to be limited by optical transmission, and a simple model is presented to overcome these limitations.
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7 August 2013
Research Article|
August 02 2013
Transparent metal electrodes from ordered nanosphere arrays
Anthony J. Morfa;
Anthony J. Morfa
1
School of Chemistry and Bio21 Institute, University of Melbourne
, Parkville, Victoria 3010, Australia
2
Institut fur Experimentalphysik, Freie Universität Berlin
, Arnimallee, 1414195 Berlin, Germany
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Eser M. Akinoglu;
Eser M. Akinoglu
2
Institut fur Experimentalphysik, Freie Universität Berlin
, Arnimallee, 1414195 Berlin, Germany
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Jegadesan Subbiah;
Jegadesan Subbiah
1
School of Chemistry and Bio21 Institute, University of Melbourne
, Parkville, Victoria 3010, Australia
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Michael Giersig;
Michael Giersig
2
Institut fur Experimentalphysik, Freie Universität Berlin
, Arnimallee, 1414195 Berlin, Germany
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Paul Mulvaney
Paul Mulvaney
1
School of Chemistry and Bio21 Institute, University of Melbourne
, Parkville, Victoria 3010, Australia
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J. Appl. Phys. 114, 054502 (2013)
Article history
Received:
May 02 2013
Accepted:
July 12 2013
Citation
Anthony J. Morfa, Eser M. Akinoglu, Jegadesan Subbiah, Michael Giersig, Paul Mulvaney; Transparent metal electrodes from ordered nanosphere arrays. J. Appl. Phys. 7 August 2013; 114 (5): 054502. https://doi.org/10.1063/1.4816790
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