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Efficient Water-Splitting Device Based on a Bismuth Vanadate Photoanode and Thin-Film Silicon Solar Cells

Han, Lihao and Abdi, Fatwa F. and van de Krol, Roel and Liu, Rui and Huang, Zhuangqun and Lewerenz, Hans-Joachim and Dam, Bernard and Zeman, Miro and Smets, Arno H. M. (2014) Efficient Water-Splitting Device Based on a Bismuth Vanadate Photoanode and Thin-Film Silicon Solar Cells. ChemSusChem, 7 (10). pp. 2832-2838. ISSN 1864-5631. http://resolver.caltech.edu/CaltechAUTHORS:20140825-111015375

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Abstract

A hybrid photovoltaic/photoelectrochemical (PV/PEC) water-splitting device with a benchmark solar-to-hydrogen conversion efficiency of 5.2 % under simulated air mass (AM) 1.5 illumination is reported. This cell consists of a gradient-doped tungsten–bismuth vanadate (W:BiVO_4) photoanode and a thin-film silicon solar cell. The improvement with respect to an earlier cell that also used gradient-doped W:BiVO4 has been achieved by simultaneously introducing a textured substrate to enhance light trapping in the BiVO4 photoanode and further optimization of the W gradient doping profile in the photoanode. Various PV cells have been studied in combination with this BiVO_4 photoanode, such as an amorphous silicon (a-Si:H) single junction, an a-Si:H/a-Si:H double junction, and an a-Si:H/nanocrystalline silicon (nc-Si:H) micromorph junction. The highest conversion efficiency, which is also the record efficiency for metal oxide based water-splitting devices, is reached for a tandem system consisting of the optimized W:BiVO_4 photoanode and the micromorph (a-Si:H/nc-Si:H) cell. This record efficiency is attributed to the increased performance of the BiVO_4 photoanode, which is the limiting factor in this hybrid PEC/PV device, as well as better spectral matching between BiVO_4 and the nc-Si:H cell.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1002/cssc.201402456DOIArticle
http://onlinelibrary.wiley.com/doi/10.1002/cssc.201402456/abstractPublisherArticle
http://onlinelibrary.wiley.com/doi/10.1002/cssc.201402456/suppinfoPublisherSupporting Information
Additional Information:© 2014 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. Received: May 23, 2014; Revised: June 19, 2014. Financial support from the VIDI project of A.H.M.S. granted by the NWO-STW and European Commission’s Framework Project 7 (NanoPEC, Project 227179) are gratefully acknowledged. R.L., Z.H., and H.-J.L. are supported by the Joint Center for Artificial Photosynthesis, a DOE Energy Innovation Hub, supported through the Office of Science of the U.S. Department of Energy under Award Number DE-SC0004993.
Group:JCAP
Funders:
Funding AgencyGrant Number
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)UNSPECIFIED
European Research Council (ERC)227179
Department of Energy (DOE)DE-SC0004993
Subject Keywords:electrochemistry; photochemistry; silicon; solar cells; water splitting
Record Number:CaltechAUTHORS:20140825-111015375
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20140825-111015375
Official Citation:Han, L., Abdi, F. F., van de Krol, R., Liu, R., Huang, Z., Lewerenz, H.-J., Dam, B., Zeman, M. and Smets, A. H. M. (2014), Efficient Water-Splitting Device Based on a Bismuth Vanadate Photoanode and Thin-Film Silicon Solar Cells. ChemSusChem, 7: 2832–2838. doi: 10.1002/cssc.201402456
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48846
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:25 Aug 2014 19:09
Last Modified:09 Jan 2017 04:17

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