Luminescent solar concentrators (LSCs) appear as an intriguing way to cope with the the mismatch between the photovoltaic (PV) cells absorption and the solar spectra, with the additional advantage of urban integration of photovoltaics [1,2]. We present LSCs based on bundles of triangular hollow-core plastic optical fibers (POFs) filled with amine-functionalized organic-inorganic hybrids (di- and tri-ureasils) doped with Rhodamine 6G, Rhodamine 800 or an Europium b-diketonate complex with visible-to-NIR tunable emission. The LSCs are characterized by optical conversion efficiency values up to hopt~5.3 % and when coupled to commercial Si PV cells yield maximum power conversion efficiency values of PCE~0.74% .
Aiming at following a sustainable route for the designing novel LSCs, photosynthesis was an inspiring natural mechanism and chlorophyll-based LSCs were processed and optically characterized. The chlorophyll molecules were extracted from Spirulina maxima which is an abundant cyanobacteria and an attractive natural source. To enable the easy and controlled processing of planar LSCs, the chlorophyll molecules were incorporated into di- and tri-ureasils with the added advantages of avoiding the formation of non-luminescent dye-aggregates, enhancing quantum yield and photostability. The chlorophyll-based LSCs were coupled to a Si-based PV device, revealing hopt and PCE) values ~3.70 % and ~0.10%, respectively, demonstrating the huge potential of nature-inspired LSCs for sustainable PV energy conversion .
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 S. F. H. Correia, A. R. Frias, L. Fu, R. Rondão, E. Pecoraro, S. J. L. Ribeiro, P. S. André, R. A. S. Ferreira, L. D. Carlos. 10.1002/adsu.201800002
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