Characterization and reduction of reabsorption losses in luminescent solar concentrators
Lindsay R. Wilson,Brenda C. Rowan,Neil Robertson,Omar Moudam,Anita C. Jones,Bryce S. Richards +5 more
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The effects of excitation wavelength on the optical properties of a luminescent solar concentrator (LSC) containing a fluorescent organic dye (Lumogen F Rot 305) are studied and the optical efficiency is shown to depend strongly on the Stokes shift of the fluorophore.Abstract:
The effects of excitation wavelength on the optical properties (emission spectrum and quantum yield) of a luminescent solar concentrator (LSC) containing a fluorescent organic dye (Lumogen F Rot 305) are studied. Excitation at wavelengths on the long-wavelength edge of the absorption spectrum of the dye results in redshifted emission, but the quantum yield remains constant at 100%. The origin of this effect and its consequences are discussed. The extent of the long-wavelength tail of the absorption spectrum of the dye is determined and the importance in reabsorption losses is shown. The optical efficiencies and photon transport probabilities of LSCs containing either an organic dye or a rare-earth lanthanide complex are compared using ray-tracing simulations and experiment. The optical efficiency is shown to depend strongly on the Stokes shift of the fluorophore. The lanthanide complex, which has a very large Stokes shift, exhibits a higher optical efficiency than the dye (64% cf. 50%), despite its lower quantum yield (86% cf. 100%).read more
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Star-shaped fluorene–BODIPY oligomers: versatile donor–acceptor systems for luminescent solar concentrators
Nathaniel J. L. K. Davis,Rowan W. MacQueen,Saul T. E. Jones,Clara Orofino-Pena,Diego Cortizo-Lacalle,Rupert G. D. Taylor,Dan Credgington,Peter J. Skabara,Neil C. Greenham +8 more
TL;DR: In this paper, the authors introduced versatile star-shaped donor-acceptor molecules based on a central BODIPY energy acceptor with oligofluorene donor side units.
Journal ArticleDOI
Investigation of Host Polymers for Luminescent Solar Concentrators
TL;DR: In this article, the authors investigated the optical properties of eight polymeric host matrices and found that poly methyl methacrylate (PMMA) and polycarbonate (PC)-based formulations exhibited the lowest internal absorbance within the spectral range of the absorption and emission bands of a red emitting fluorescent organic dye (Lumogen Red 305).
Journal ArticleDOI
Aggregation-induced emission-mediated spectral downconversion in luminescent solar concentrators
Bolong Zhang,James L. Banal,David J. Jones,Ben Zhong Tang,Kenneth P. Ghiggino,Wallace W. H. Wong +5 more
TL;DR: In this paper, the photophysics of a benzothiadiazole-based emissive aggregate, PITBT-TPE, was characterized for luminescent solar concentrators.
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Preparation and photophysical studies of [Ln(hfac)3DPEPO], Ln = Eu, Tb, Yb, Nd, Gd; interpretation of total photoluminescence quantum yields.
Martina Congiu,Mohamed Alamiry,Omar Moudam,Serena Ciorba,Patricia R. Richardson,Laurent Maron,Anita C. Jones,Bryce S. Richards,Neil Robertson +8 more
TL;DR: Electronic absorption and emission spectroscopy and DFT calculations of the excited state of the Eu complex elucidate the role of each ligand in the sensitisation of the lanthanide through the antenna effect and investigate the factors responsible for the variation in total photoluminescence quantum yield.
Journal ArticleDOI
Homeotropic alignment and Förster resonance energy transfer: The way to a brighter luminescent solar concentrator
TL;DR: In this paper, the authors investigated homeotropically aligned fluorophores and Forster resonance energy transfer (FRET) for luminescent solar concentrators using Monte-Carlo ray tracing.
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