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Au–Pt core–shell nanoemitters on silicon for photoelectrochemical solar energy conversion

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons41525

Lublow,  Michael
Helmholtz-Zentrum Berlin für Materialien und Energy GmbH, Division Solar Energy Research, Elektronenspeicherring BESSY II;
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

Kubala,  Sven
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Zitation

Lublow, M., Bouabadi, B., & Kubala, S. (2012). Au–Pt core–shell nanoemitters on silicon for photoelectrochemical solar energy conversion. Solar Energy Materials and Solar Cells, 107, 56-62. doi:10.1016/j.solmat.2012.07.018.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000E-AF51-9
Zusammenfassung
Electrochemical self-organization principles were applied for nanofabrication of Au–Pt core–shell nanoemitters on pre-structured porous SiO2/Si interfaces. The silicon templates were fabricated by oscillatory photocurrent cycles in fluoride containing solutions, permitting subsequent local electrodeposition of rectifying metal heterocontacts into the pores. Enhanced light absorption of this Au–Pt/SiO2/Si nanoarchitecture is deduced from Mie scattering analysis and Finite Difference Time Domain simulations in dependence on the Pt-shell thickness. Test operation as photoelectrochemical cells in I−/I3− redox electrolytes shows conversion efficiencies of 11.6% improving thus the performance of the cells without plasmonic enhancement. It is thereby proven that self-organized electrochemical conditioning on the nanoscale can be successfully applied for preparation of advanced photovoltaic systems, opening thereby new avenues for low-cost production also of solid-state devices.