Journal article

Conductive and Stable Magnesium Oxide Electron-Selective Contacts for Efficient Silicon Solar Cells

Yimao Wan, Chris Samundsett, James Bullock, Mark Hettick, Thomas Allen, Di Yan, Jun Peng, Yiliang Wu, Jie Cui, Ali Javey, Andres Cuevas

ADVANCED ENERGY MATERIALS | WILEY-V C H VERLAG GMBH | Published : 2017

Abstract

A high Schottky barrier (>0.65 eV) for electrons is typically found on lightly doped n-type crystalline (c-Si) wafers for a variety of contact metals. This behavior is commonly attributed to the Fermi-level pinning effect and has hindered the development of n-type c-Si solar cells, while its p-type counterparts have been commercialized for several decades, typically utilizing aluminium alloys in full-area, and more recently, partial-area rear contact configurations. Here the authors demonstrate a highly conductive and thermally stable electrode composed of a magnesium oxide/aluminium (MgOx/Al) contact, achieving moderately low resistivity Ohmic contacts on lightly doped n-type c-Si. The elec..

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Grants

Awarded by Australian Government through the Australian Research Council


Awarded by Office of Science of the US Department of Energy


Funding Acknowledgements

This work was supported by the Australian Government through the Australian Research Council (Discovery Project: DP150104331). Some facilities at the Australian National Fabrication Facility and Centre for Advanced Microscopy at ANU were used. XPS characterization was performed at the Joint Center for Artificial Photosynthesis, supported through the Office of Science of the US Department of Energy under Award Number DE-SC0004993. A.J., M.H., and J.B. acknowledge funding from the Bay Area Photovoltaics Consortium (BAPVC).