Chapter 5. Recent Progress in Quantum Well Solar Cells
| Autor: | Barnham, K.W.J., Ballard, IM, Browne, BC, Bushnell, DB, Connolly, JP, Ekins-Daukes, NJ, Fuhrer, M., Ginige, R., Hill, G., Ioannides, A., Johnson, DC, Lynch, MC, Mazzer, M, Roberts, JS, Rohr, C, Tibbits, TND |
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| Jazyk: | angličtina |
| Rok vydání: | 2010 |
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| Zdroj: | Nanotechnology for Photovoltaics, pp. 187–210, 2010 info:cnr-pdr/source/autori:Barnham, K.W.J.; Ballard, IM; Browne, BC; Bushnell, DB; Connolly, JP; Ekins-Daukes, NJ; Fuhrer, M.; Ginige, R.; Hill, G.; Ioannides, A.; Johnson, DC; Lynch, MC; Mazzer, M; Roberts, JS; Rohr, C; Tibbits, TND/titolo:Chapter 5. Recent Progress in Quantum Well Solar Cells/titolo_volume:Nanotechnology for Photovoltaics/curatori_volume:/editore:/anno:2010 |
| DOI: | 10.1201/9781420076752-c5 |
| Popis: | Quantum well solar cells are the result of the application of nanotechnology to enhance of the efficiency of concentrator solar cells. The band gap of a quantum well (QW) solar cell can be adapted to the incident spectral conditions by tailoring the QW depth. The single-junction strain-balanced quantum well solar cell (SB-QWSC) has achieved an efficiency of 28.3%. The dominant loss mechanism at the high concentrator cell operating bias is due to radiative recombination, so a major route to further efficiency improvement requires a restriction of the optical losses. It has been found that (100) biaxial compressive strain suppresses a mode of radiative recombination in the plane of the QWs. As biaxial strain can only be engineered into a solar cell on the nanoscale, SB-QWSCs are seen to have a fundamental efficiency advantage over equivalent bulk cells. Strain-balanced quantum wells in multi-junction solar cells can current match the sub-cells without the introduction of dislocations. Quantum-well (QW) technology was proved to boos the efficiency of triple-junction cells by around 3 percent in absolute terms. In fact 40 percent median efficiency has been achieved across production wafers. |
| Databáze: | OpenAIRE |
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