The use of electro-deoxidation in molten salts to reduce the energy consumption of solar grade silicon and increase the output of PV solar cells
| Autor: | Derek J. Fray, Paul R. Coxon, Eimutis Juzeliunas, Michael Coto |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
Silicon Mineralogy chemistry.chemical_element Quantum dot solar cell Polymer solar cell law.invention Monocrystalline silicon chemistry.chemical_compound Photovoltaics law Solar cell lcsh:TA401-492 Electrochemistry General Materials Science Plasmonic solar cell General business.industry Black silicon Solar cell photovoltaics Silicon molten salt chemistry Optoelectronics lcsh:Materials of engineering and construction. Mechanics of materials business |
| Zdroj: | Progress in Natural Science: Materials International, Vol 25, Iss 6, Pp 583-590 (2015) |
| ISSN: | 1002-0071 |
| DOI: | 10.1016/j.pnsc.2015.11.006 |
| Popis: | Solar photovoltaics, based upon silicon, are the most popular form of solar cell with efficiencies around 20%. These efficiencies can be further increased by employing light trapping schemes to minimise optical losses through scattering and reflection which enhances the amount of light absorbed and number of photo-carriers generated. Typical approaches employ antireflection coatings (ARCs) or texturise the surface of the silicon disks, so that the structure consists of an array of needles which can absorb most of the light. Usually, these structures are created by leaching the silicon with hydrofluoric-based acids or by reactive ion etching (RIE) methods. This paper reviews some of the methods for improving the energy efficiency of silicon production, and describes the use of electro-deoxidation of SiO2 layers, on silicon, in molten calcium chloride to form nano-porous black silicon (b-Si) structures. By coating b-Si surface with TiO2, a common ARC, extremely black surfaces with negligible reflectance of about 0.1%, are produced, which can have applications for low-cost high efficiency solar cells. |
| Databáze: | OpenAIRE |
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