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Open Access Nano Express

Solution-processed germanium nanowire-positioned Schottky solar cells

Ju-Hyung Yun12, Yun Chang Park3, Joondong Kim1*, Hak-Joo Lee1, Wayne A Anderson2* and Jeunghee Park4

Author Affiliations

1 Nano-Mechanical Systems Research Center, Korea Institute of Machinery and Materials (KIMM), Daejeon 305343, Korea

2 Department of Electrical Engineering, University at Buffalo, State University of New York, Buffalo, New York 14260, USA

3 Measurement and Analysis Division, National Nanofab Center (NNFC), Daejeon 305806, Korea

4 Department of Chemistry, Korea University, Jochiwon 339700, Korea

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Nanoscale Research Letters 2011, 6:287  doi:10.1186/1556-276X-6-287

Published: 4 April 2011

Abstract

Germanium nanowire (GeNW)-positioned Schottky solar cell was fabricated by a solution process. A GeNW-containing solution was spread out onto asymmetric metal electrodes to produce a rectifying current flow. Under one-sun illumination, the GeNW-positioned Schottky solar cell yields an open-circuit voltage of 177 mV and a short-circuit current of 19.2 nA. Schottky and ohmic contacts between a single GeNW and different metal electrodes were systematically investigated. This solution process may provide a route to the cost-effective nanostructure solar architecture.