Journal article
Wireless Photoelectrochemical Water Splitting Using Triple-Junction Solar Cell Protected by TiO2
Department of Physics, Technical University of Denmark1
Surface Physics and Catalysis, Department of Physics, Technical University of Denmark2
VISION – Center for Visualizing Catalytic Processes, Centers, Technical University of Denmark3
National Centre for Nano Fabrication and Characterization, Technical University of Denmark4
Photoelectrochemical (PEC) water splitting devices replace electrical contacts in a solid-state solar cell with a solid/liquid junction to improve the solar-to-H2conversion efficiency and reduce system cost. The wireless configuration can fully use the advantage of the PEC by removing all electrical contacts; however, the wired configuration with the electrical contact on its back side has been widely studied to facilitate device characterization.
In this study, a wireless PEC water splitting device made of a commercially available III-V triple-junction solar cell protected by transparent TiO2 is demonstrated with high efficiency and stability. The wireless device produces both H2 and O2 products in a stoichiometric ratio in 13% of solar-to-H2 conversion efficiency over ∼12 h, and the total amount of H2 product during the lifetime of the device reaches 51 mL/cm2 , which is the highest value reported from wireless PEC devices to the best of our knowledge.
Language: | English |
---|---|
Year: | 2020 |
Pages: | 100261 |
ISSN: | 26663864 |
Types: | Journal article |
DOI: | 10.1016/j.xcrp.2020.100261 |
ORCIDs: | Seger, Brian , Vesborg, Peter Christian Kjærgaard , Hansen, Ole and Chorkendorff, Ib |