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Título: | Sustainable luminescent solar concentrators based on organic–inorganic hybrids modified with chlorophyll |
Autor: | Frias, Ana R.; Pecoraro, Edison; Correia, Sandra F. H.; Minas, L.M.G.; Bastos, A. R.; García-Revilla, Sara CSIC ORCID; Balda, Rolindes CSIC ORCID; Ribeiro, Sidney J. L.; André, Paulo S.; Carlos, Luis D.; Ferreira, Rute A. S. | Fecha de publicación: | 2018 | Editor: | Royal Society of Chemistry (UK) | Citación: | Journal of Materials Chemistry A 6(18): 8712-8723 (2018) | Resumen: | Luminescent solar concentrators (LSCs) are luminescent waveguide layers that convert sunlight into specific wavelengths which are then guided by total internal reflection to a PV device located at the edges of the LSC. Their ability to concentrate sunlight onto small areas makes LSCs a useful complement to silicon-based PVs in a series of applications, such as urban integration and flexible fabrics towards mobile solar-energy. Challenges for the luminescent layer include the use of low-cost and sustainable nature-based organic molecules. We report novel chlorophyll-based LSCs with emission properties in the red/NIR spectral region. Here, chlorophyll molecules extracted from Spirulina maxima, an abundant cyanobacterium and an attractive natural source, are immobilized in organic–inorganic di- and tri-ureasil matrices enabling the production of sustainable LSCs. At low chlorophyll concentrations (<3 × 1017 molecules per cm3), the photophysical properties of the chlorophyll molecules after incorporation into the hybrids closely resemble those in ethanolic solution (with an absolute emission quantum yield of ∼0.16 and a fluorescence lifetime of ∼8 ns). The LSCs were coupled to a Si-based commercial PV device revealing optical conversion efficiency and power conversion efficiency values of ∼3.70% and 0.10%, respectively, illustrating the potential of this approach for the development of nature-based LSCs meeting the requirements of reliable, sustainable and competitive energy systems. | Versión del editor: | https://doi.org/10.1039/C8TA01712C | URI: | http://hdl.handle.net/10261/178418 | DOI: | 10.1039/C8TA01712C | ISSN: | 2050-7488 | E-ISSN: | 2050-7496 |
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