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Descripción
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| The intermediate band solar cell is a novel photovoltaic device with a theoretical efficiency limit of 63.2%. Its potential relies on the capability of increasing the photogenerated current without reducing the output voltage. To realize this concept in practice, it is necessary to synthesize an intermediate band material, that is, a new kind of semiconductor with a third electronic band within the bandgap. In this material, electronic populations in all three bands should be split at room temperature (i.e., split quasi-Fermi levels) and nonradiative recombination rates should not be high. Currently, two approaches are being investigated: self-assembled quantum dot arrays and impurity-doped semiconductors. Prototypes containing quantum dots behave as intermediate band solar cells at low temperature, but to date their properties fail at room temperature. Impurity-doped materials exhibit promising optical properties and researchers are currently working on reducing their nonradiative recombination rates. | |
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Internacional
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Si |
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DOI
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10.1016/B978-0-08-087872-0.00127-X |
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Edición del Libro
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Editorial del Libro
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Elsevier |
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ISBN
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978-0-08-087873-7 |
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Serie
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Photovoltaic Solar Energy |
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Título del Libro
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Comprehensive Renewable Energy |
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Desde página
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619 |
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Hasta página
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639 |