Light harvesting architectures for electron beam evaporated solid phase crystallized Si thin film solar cells: Statistical and periodic approaches
| Autor: | Bernd Rech, Daniel Lockau, Carola Klimm, Eveline Rudigier-Voigt, Tobias Sontheimer, Christiane Becker, Matthias Bockmeyer |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
Fabrication business.industry Substrate (electronics) engineering.material Condensed Matter Physics Electron beam physical vapor deposition Light scattering Electronic Optical and Magnetic Materials Optics Coating Etching (microfabrication) Materials Chemistry Ceramics and Composites engineering Optoelectronics business Absorption (electromagnetic radiation) Layer (electronics) |
| Zdroj: | Journal of Non-Crystalline Solids. 358:2303-2307 |
| ISSN: | 0022-3093 |
| Popis: | The fabrication of light trapping architectures for electron beam (e-beam) evaporated polycrystalline Si thin film solar cells is investigated based on tailored self-organized light scattering silica nanospheres and 2 dimensional periodic nanoimprinted structures on glass. A microscopic analysis reveals a unique correlation between the microstructure of high-rate e-beam evaporated Si and the substrate topography. These features provide the basis for the design of nanostructured Si that complies with its distinctive growth characteristics. A layer of self-organized nanospheres embedded in a sol–gel matrix and an anti-reflection coating is found to be an e-beam compatible light trapping approach for poly-Si solar cells, contributing to an increase of 50% in current collection. We developed a preparation process for arrays of equidistant free-standing Si crystals with remarkable optical absorption characteristics based on a nanoimprinted glass substrate by selectively etching e-beam evaporated Si. This periodic approach opens design possibilities for effective three-dimensional architectures for advanced photon management. |
| Databáze: | OpenAIRE |
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