Metal electrodeposition onto (photo)electrochemically prepared nanostructured silicon surfaces: solar applications
| Autor: | H.-J. Lewerenz |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Materials science
Silicon Nanoporous Scanning electron microscope business.industry Metals and Alloys Oxide Schottky diode chemistry.chemical_element Nanotechnology Surfaces and Interfaces Condensed Matter Physics Surfaces Coatings and Films law.invention Nanopore chemistry.chemical_compound chemistry Mechanics of Materials law Electrode Solar cell Optoelectronics business |
| Zdroj: | Transactions of the IMF. 86:19-33 |
| ISSN: | 1745-9192 0020-2967 |
| DOI: | 10.1179/174591908x264400 |
| Popis: | Self-organised electrochemical processes such as oscillatory currents on silicon electrodes produce surface patterns that can be used for low temperature preparation of scaleable efficient photoactive structures. Nanoporous oxides, formed during such processes, provide the template for device fabrication. Electrodeposition of suited metals into the oxide nanopores produces Schottky type, i.e. rectifying semiconductor–metal, junctions. With n-Si/SiO2/Pt/I−-I3− photoelectrochemical solar cells, solar to electrical conversion efficiencies above 10% have been realised. With an analogous structure based on p type Si, light assisted H2 evolution is found. In system synchrotron radiation photoelectron spectroscopy (SRPES), high resolution scanning electron miroscopy (HRSEM) and tapping mode atomic force microscopy (TM–AFM) are employed to characterise the surface chemistry and nanotopography upon Pt electrodeposition in model experiments on (hydrogen terminated) Si (111) (1×1):H and step bunched Si (111)... |
| Databáze: | OpenAIRE |
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