Photoelectrochemical cell for water decomposition with a hybrid photoanode and a metal-hydride cathode
| Autor: | P. M. Sylenko, O.Y. Khyzhun, D.B. Dan’Ko, L.G. Shcherbakova, Yu. M. Solonin, O.G. Ershova, A. M. Shlapak |
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| Rok vydání: | 2013 |
| Předmět: |
Photocurrent
Materials science Renewable Energy Sustainability and the Environment Electrolyte Chemical vapor deposition Photoelectrochemical cell Photochemistry Cathode Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Solar cell efficiency Chemical engineering law Solar cell Layer (electronics) |
| Zdroj: | Solar Energy Materials and Solar Cells. 114:172-178 |
| ISSN: | 0927-0248 |
| Popis: | The operation of a photoelectrochemical cell for hydrogen production by water decomposition under simulated sunlight (a 150 W Xe lamp) with a hybrid photoanode based on a Si solar cell and TiO 2 film as well as with a metal-hydride cathode based on LaNi 5 alloy has been investigated. TiO 2 films were produced by the chemical vapor deposition (CVD) method. A new technique of production of continuous CVD TiO 2 films on semiconductor surface has been proposed. The peculiarity of this technique is a deposition of a thin (30–40 nm) Ti layer on the substrate prior to a TiO 2 deposition. This metal layer serves as the catalyst of following TiO 2 film growth and then it is oxidized to TiO 2 . Continuous TiO 2 films obtained by such a way protect the solar cell surface from oxidation in the electrolyte. The optimal TiO 2 film thickness and structure for highest photocurrent have been determined. It has been shown that the use of the metal-hydride cathode based on LaNi 5 alloy instead of a Pt cathode increases significantly (up to 50%) the solar cell efficiency. The photoconversion efficiency attained 2% with the Pt cathode and 3% with the metal-hydride cathode. |
| Databáze: | OpenAIRE |
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