Voltage recovery in intermediate band solar cells
| Autor: | Antonio Martí, Colin Stanley, C.D. Farmer, P.G. Linares, Iñigo Ramiro, Elisa Antolin, Antonio Luque |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
Organic solar cell Band gap 02 engineering and technology 01 natural sciences 7. Clean energy law.invention law 0103 physical sciences Solar cell Absorption (electromagnetic radiation) 010302 applied physics Theory of solar cells Renewable Energy Sustainability and the Environment business.industry Photovoltaic system 021001 nanoscience & nanotechnology Surfaces Coatings and Films Electronic Optical and Magnetic Materials Multiple exciton generation Solar cell efficiency Energías Renovables Optoelectronics Electrónica 0210 nano-technology business |
| Zdroj: | Solar Energy Materials And Solar Cells, ISSN 0927-0248, 2012-03, Vol. 98 Archivo Digital UPM Universidad Politécnica de Madrid |
| ISSN: | 0927-0248 |
| DOI: | 10.1016/j.solmat.2011.11.015 |
| Popis: | The intermediate band solar cell (IBSC) is based on a novel photovoltaic concept and has a limiting efficiency of 63.2%, which compares favorably with the 40.7% efficiency of a conventional, single junction solar cell. It is characterized by a material hosting a collection of energy levels within its bandgap, allowing the cell to exploit photons with sub-bandgap energies in a two-step absorption process, thus improving the utilization of the solar spectrum. However, these intermediate levels are often regarded as an inherent source of supplementary recombination, although this harmful effect can in theory be counteracted by the use of concentrated light. We present here a novel, low-temperature characterization technique using concentrated light that reveals how the initially enhanced recombination in the IBSC is reduced so that its open-circuit voltage is completely recovered and reaches that of a conventional solar cell. |
| Databáze: | OpenAIRE |
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