Urbain, Félix and Smirnov, Vladimir and Becker, Jan-Philipp and Rau, Uwe and Finger, Friedhelm and Ziegler, Jürgen and Kaiser, Bernhard and Jaegermann, Wolfram (2014):
a-Si:H/µc-Si:H tandem junction based photocathodes with high open-circuit voltage for efficient hydrogen production.
In: Journal of Materials Research, 29 (22), pp. 2605-2614. Cambridge University Press, ISSN 0884-2914,
[Article]
Abstract
Thin film silicon tandem junction solar cells based on amorphous silicon (a-Si:H) and microcrystalline silicon (µc-Si:H) were developed with focus on high open-circuit voltages for the application as photocathodes in integrated photoelectrochemical cells for water electrolysis. By adjusting various parameters in the plasma enhanced chemical vapor deposition process of the individual µc-Si:H single junction solar cells, we showed that a-Si:H/µc-Si:H tandem junction solar cells exhibit open-circuit voltage over 1.5 V with solar energy conversion efficiency of 11% at a total silicon layer thickness below 1 µm. Our approach included thickness reduction, controlled SiH4 profiling, and incorporation of intrinsic interface buffer layers. The applicability of the tandem devices as photocathodes was evaluated in a photoelectrochemical cell. The a-Si:H/µc-Si:H based photocathodes exhibit a photocurrent onset potential of 1.3 V versus RHE and a short-circuit photocurrent of 10.0 mA/cm2. The presented approach may provide an efficient and low-cost pathway to solar hydrogen production.
Item Type: | Article |
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Erschienen: | 2014 |
Creators: | Urbain, Félix and Smirnov, Vladimir and Becker, Jan-Philipp and Rau, Uwe and Finger, Friedhelm and Ziegler, Jürgen and Kaiser, Bernhard and Jaegermann, Wolfram |
Title: | a-Si:H/µc-Si:H tandem junction based photocathodes with high open-circuit voltage for efficient hydrogen production |
Language: | English |
Abstract: | Thin film silicon tandem junction solar cells based on amorphous silicon (a-Si:H) and microcrystalline silicon (µc-Si:H) were developed with focus on high open-circuit voltages for the application as photocathodes in integrated photoelectrochemical cells for water electrolysis. By adjusting various parameters in the plasma enhanced chemical vapor deposition process of the individual µc-Si:H single junction solar cells, we showed that a-Si:H/µc-Si:H tandem junction solar cells exhibit open-circuit voltage over 1.5 V with solar energy conversion efficiency of 11% at a total silicon layer thickness below 1 µm. Our approach included thickness reduction, controlled SiH4 profiling, and incorporation of intrinsic interface buffer layers. The applicability of the tandem devices as photocathodes was evaluated in a photoelectrochemical cell. The a-Si:H/µc-Si:H based photocathodes exhibit a photocurrent onset potential of 1.3 V versus RHE and a short-circuit photocurrent of 10.0 mA/cm2. The presented approach may provide an efficient and low-cost pathway to solar hydrogen production. |
Journal or Publication Title: | Journal of Materials Research |
Journal volume: | 29 |
Number: | 22 |
Publisher: | Cambridge University Press |
Uncontrolled Keywords: | photovoltaic, photochemical, Si |
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 12:44 |
Official URL: | http://dx.doi.org/10.1557/jmr.2014.308 |
Identification Number: | doi:10.1557/jmr.2014.308 |
Funders: | The research is partly financially supported by the Deutsche Forschungsgemeinschaft (DFG) Priority Programme 1613: , Regeneratively produced fuels by light driven water splitting: Investigation of involved elementary processes and perspectives of technologic implementation, , and by the Bundesministerium für Bildung und Forschung (BMBF) in the network project: Sustainable Hydrogen (FKZ 03X3581B). |
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