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Silicon based tandem cells: novel photocathodes for hydrogen production

Calvet, W. and Murugasen, E. and Klett, J. and Kaiser, B. and Jaegermann, W. and Finger, F. and Hoch, S. and Blug, M. and Busse, J. (2014):
Silicon based tandem cells: novel photocathodes for hydrogen production.
In: Physical Chemistry Chemical Physics, 16 (24), p. 12043. RSC Publishing, ISSN 1463-9076,
[Article]

Abstract

A photovoltaic tandem cell made of amorphous silicon (a-Si) and microcrystalline silicon (μc-Si) was investigated as a photocathode for hydrogen evolution in a photoelectrochemical device. The electronic and electrochemical properties of the samples were characterized using X-ray photoemission spectroscopy (XPS) and cyclic voltammetry (CV), whereas the morphology of the surface in contact with the electrolyte was investigated by scanning electron microscopy (SEM). The electric efficiency of the tandem cell was determined to be 5.2% in a photoelectrochemical (PEC) setup in acidic solution which is only about half of the photovoltaic efficiency of the tandem cell. A significant improvement in efficiency was achieved with platinum as a catalyst which was deposited by physical vapour deposition (PVD) under ultra-high vacuum (UHV) conditions.

Item Type: Article
Erschienen: 2014
Creators: Calvet, W. and Murugasen, E. and Klett, J. and Kaiser, B. and Jaegermann, W. and Finger, F. and Hoch, S. and Blug, M. and Busse, J.
Title: Silicon based tandem cells: novel photocathodes for hydrogen production
Language: English
Abstract:

A photovoltaic tandem cell made of amorphous silicon (a-Si) and microcrystalline silicon (μc-Si) was investigated as a photocathode for hydrogen evolution in a photoelectrochemical device. The electronic and electrochemical properties of the samples were characterized using X-ray photoemission spectroscopy (XPS) and cyclic voltammetry (CV), whereas the morphology of the surface in contact with the electrolyte was investigated by scanning electron microscopy (SEM). The electric efficiency of the tandem cell was determined to be 5.2% in a photoelectrochemical (PEC) setup in acidic solution which is only about half of the photovoltaic efficiency of the tandem cell. A significant improvement in efficiency was achieved with platinum as a catalyst which was deposited by physical vapour deposition (PVD) under ultra-high vacuum (UHV) conditions.

Journal or Publication Title: Physical Chemistry Chemical Physics
Journal volume: 16
Number: 24
Publisher: RSC Publishing
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Surface Science
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 27 Feb 2015 13:07
Official URL: http://dx.doi.org/10.1039/c3cp55198a
Identification Number: doi:10.1039/c3cp55198a
Funders: Partial financial support of this project by the DFG cluster of excellence ‘‘Smart Interfaces’’ and by the DFG priority program SPP 1613, as well as co-funding by Evonik Industries AG (part- financed by the State of North Rhine Westphalia and co-financed by the European Union ‘‘Investing in our Future, European Regional Development Fund’’) is gratefully acknowledged.
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