NDLI: Efficient water-splitting device based on a bismuth vanadate photoanode and thin-film silicon solar cells.

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Efficient water-splitting device based on a bismuth vanadate photoanode and thin-film silicon solar cells.

Content Provider	Semantic Scholar
Author	Han, Lihao Abdi, Fatwa Firdaus Krol, Roel Van De Huang, Zhuangqun Lewerenz, Hans-Joachim Zeman, Miro Smets, Arno H. M.
Copyright Year	2014
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:BiVO4 ) 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 BiVO4 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:BiVO4 photoanode and the micromorph (a-Si:H/nc-Si:H) cell. This record efficiency is attributed to the increased performance of the BiVO4 photoanode, which is the limiting factor in this hybrid PEC/PV device, as well as better spectral matching between BiVO4 and the nc-Si:H cell.
File Format	PDF HTM / HTML
DOI	10.1002/cssc.201402456
PubMed reference number	25138735
Journal	Medline
Volume Number	7
Issue Number	10
Alternate Webpage(s)	http://authors.library.caltech.edu/48846/13/Han_2014p2832.pdf
Alternate Webpage(s)	https://doi.org/10.1002/cssc.201402456
Journal	ChemSusChem
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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