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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Ureasil organic–inorganic hybrids as photoactive waveguides for conjugated polyelectrolyte luminescent solar concentrators
Ilaria Meazzini,Camille Blayo,Jochen Arlt,Ana-Teresa Marques,Ana-Teresa Marques,Ullrich Scherf,Hugh D. Burrows,Rachel C. Evans,Rachel C. Evans +8 more
TL;DR: In this paper, a series of LSCs are fabricated using a poly(fluorene-altphenylene) copolymer containing on-chain perylenediimide (PDI) chromophore units as the luminophore (PBS-PFP-PDI), immobilised within a poly (oxyalkylene)/siloxane organic-inorganic hybrid, known as a ureasil, as the waveguide.
Journal ArticleDOI
Luminescent solar concentrators based on thermally activated delayed fluorescence dyes
TL;DR: In this paper, a TADF dye-based luminescent solar concentrator (LSC) was proposed for efficient solar energy generation, where two carbazole dicyanobenzene (CDCB) derivative dyes were synthesized and employed in a bulk LSC device.
Journal ArticleDOI
Review on Colloidal Quantum Dots Luminescent Solar Concentrators
Andrew Kim,Alireza Hosseinmardi,Pratheep K. Annamalai,Pawan Kumar,Pawan Kumar,Rajkumar Patel +5 more
TL;DR: In this article, a review of the latest developments in colloidal quantum dots (QDs) for luminous solar concentrators is presented, including basic, doped, core/shell, hybrid, and Si-based QDs.
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Efficiency improvement of luminescent solar concentrators using upconversion nitrogen-doped graphene quantum dots
TL;DR: In this article, a new nitrogen-doped graphene quantum dot (N-GQD) possessing upconversion photoluminescence (UCPL), single color emission in UV-Vis-NIR region has been introduced.
Journal ArticleDOI
Anisotropic light emissions in luminescent solar concentrators-isotropic systems
TL;DR: A model is developed to describe the emission profile from randomly oriented dichroic dye molecules in a luminescent solar concentrator (LSC) waveguide as a function of incoming light direction, which helps explain the large surface losses measured in these devices.
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