Journal article
Carrier-selective p- and n-contacts for efficient and stable photocatalytic water reduction
Department of Physics, Technical University of Denmark1
Surface Physics and Catalysis, Department of Physics, Technical University of Denmark2
Department of Micro- and Nanotechnology, Technical University of Denmark3
Silicon Microtechnology, Department of Micro- and Nanotechnology, Technical University of Denmark4
Center for Electron Nanoscopy, Technical University of Denmark5
The successful realization of carrier-selective contacts for crystalline silicon (c-Si) based device for pho-tocatalytic hydrogen production has been demonstrated. The proposed TiO2protected carrier-selectivecontacts resemble a metal-oxide-semiconductor configuration, including a highly-doped nanocrystallinesilicon (nc-Si) and a tunnel oxide, thereby form a heterostructure with the c-Si substrate.
By substitutingconventional pn+-junction Si by c-Si/SiOX/nc-Si structure for both front and back contacts we demon-strate a 16% increase in photovoltage (an open circuit voltage of 584 mV under AM 1.5G conditions).TiO2 protected carrier-selective photoelectrodes showed excellent long-term durability in acidic aqueoussolution having stable photocurrent output for more than 40 days, implying that the proposed carrier-selective contact is a promising configuration to substitute for the conventional pn-junction based c-Siphotocathodes.
Language: | English |
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Year: | 2017 |
Pages: | 59-64 |
ISSN: | 18734308 and 09205861 |
Types: | Journal article |
DOI: | 10.1016/j.cattod.2016.11.028 |
ORCIDs: | Bae, Dowon , Pedersen, Thomas , Seger, Brian , Iandolo, Beniamino , Hansen, Ole , Vesborg, Peter Christian Kjærgaard and Chorkendorff, Ib |