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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Thirty Years of Luminescent Solar Concentrator Research: Solar Energy for the Built Environment
TL;DR: The luminescent solar concentrator (LSC) is a simple device at its heart, employing a polymeric or glass waveguide and luminecent molecules to generate electricity from sunlight when attached to a photovoltaic cell as mentioned in this paper.
Journal ArticleDOI
Spectral beam splitting for efficient conversion of solar energy - A review
TL;DR: In this article, the authors provide a review on the recently published research in this field and discuss the drawbacks associated with practical applications, including geometrical limitations and fabrication costs of spectrally splitting solar receivers.
Journal ArticleDOI
Zero-reabsorption doped-nanocrystal luminescent solar concentrators.
Christian S. Erickson,Liam R. Bradshaw,Stephen McDowall,John D. Gilbertson,Daniel R. Gamelin,David Patrick +5 more
TL;DR: Doped semiconductor nanocrystals are introduced as a new class of phosphors for use in luminescent solar concentrators, for the first time bounded not by luminophore self-absorption but by the transparency of the waveguide itself.
Journal ArticleDOI
Spectral conversion of light for enhanced microalgae growth rates and photosynthetic pigment production
TL;DR: The proposed illumination strategy offers improved microalgae growth without resorting to artificial light sources, reducing energy use and costs of cultivation.
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A leaf-inspired luminescent solar concentrator for energy-efficient continuous-flow photochemistry
TL;DR: A leaf-inspired photomicroreactor is reported that constitutes a merger between luminescent solar concentrators (LSCs) and flow photochemistry to enable green and efficient reactions powered by solar irradiation.
References
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Measurement method for photoluminescent quantum yields of fluorescent organic dyes in polymethyl methacrylate for luminescent solar concentrators
TL;DR: A method for measuring the photoluminescent quantum yields (PLQY) of luminescent organic dyes shows an absence of any reduction in a dye mixture as compared with the individual PLQY of the dyes.
Journal ArticleDOI
Luminescent solar concentrators and the reabsorption problem.
TL;DR: It is suggested that LSCs can be made more efficient with a system which utilizes radiationless electronic excited state transport and trapping as intermediate steps between absorption and reemission.
Journal ArticleDOI
Quantum dot solar concentrators: Electrical conversion efficiencies and comparative concentrating factors of fabricated devices
TL;DR: In this article, a novel non-tracking concentrator is described, which uses nano-scale quantum dot technology to render the concept of a fluorescent dye solar concentrator (FSC) a practical proposition.
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Controlling Light Emission in Luminescent Solar Concentrators Through Use of Dye Molecules Aligned in a Planar Manner by Liquid Crystals
Paul P. C. Verbunt,Anton Kaiser,Ko Hermans,Cees W. M. Bastiaansen,Cees W. M. Bastiaansen,Dirk J. Broer,Michael G. Debije +6 more
TL;DR: In this paper, anisotropic fluorescent dyes and liquid crystal mesogens were used to control the direction of emitted light in a luminescent solar concentrator (LSC) waveguide.
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Fluorescent solar energy collectors: Operating conditions with diffuse light
TL;DR: In this article, the fluorescent energy conversion principle using several sheets of transparent material doped with fluorescent molecules to concentrate radiation is extended to include diffuse radiation, and two cases are treated here: diffuse radiation only and a composite spectrum consisting of 40% direct and 60% diffuse radiation simulating the average illumination of a flat exposure in central Europe.
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