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High transmission nanowire contact arrays with subwavelength spacing |
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| Authors: | Etor San Román Alan Vitrey Jerónimo Buencuerpo Iván Fernández Iván Prieto Benito Alén Antonio García‐Martín José M. Llorens S. R. J. Brueck José M. Ripalda |
| Affiliation: | 1. IMM‐Instituto de Microelectrónica de Madrid (CNM‐CSIC), PTM, E‐28760 Tres Cantos, Madrid, Spain;2. Currently at ETH Zurich Laboratory for Solid State Physics HPF F2, Zürich, Switzerland;3. Center for High Technology Materials, University of New Mexico, NM 87106, USA |
| Abstract: | We demonstrate high optical transmission in solar cell contacts based on nanowire arrays with subwavelength spacing. The photocurrent results obtained from fabricated devices are compared with numerical simulations. The proposed contact design leads to optical losses significantly smaller than the fraction of the top surface taken up by the metallic contact (<10% vs. 36%). The resulting sheet resistance of the contact is 46.7 Ω/square, comparing favourably with transparent conductive oxides.  |
| Keywords: | photovoltaics plasmonics metals nanowires semiconductors contacts |