Luminescent solar concentrator development: Final subcontract report, 1 June 1982-31 December 1984

Friedman, Peter S.; Parent, C.

doi:10.2172/6196790

Cited by 8 publications

(6 citation statements)

References 6 publications

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“…Numerous different fluorophores have been developed and tested for use in LSCs, including organic dyes [7][8][9], quantum dots [10][11][12][13], and rare-earth materials [14][15][16]. However, a problem common to both organic dyes and quantum dots is the effect of reabsorption resulting from an overlap of their absorption and emission spectra.…”

Section: Introductionmentioning

confidence: 99%

Characterization and reduction of reabsorption losses in luminescent solar concentrators

et al. 2010

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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%).

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Section: Introductionmentioning

confidence: 99%

Characterization and reduction of reabsorption losses in luminescent solar concentrators

et al. 2010

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“…In addition, the lack of photostability is typical of organic dyes is severely limiting the possibility of application in LSCs . While some ultrastable organic dyes have been lately identified and some metal–organic complexes are characterized by excellent stability, finding a dye exhibiting simultaneously the entire set of required optical property for successful application in an LSC is challenging …”

Section: Nanomaterials Application In Lscsmentioning

confidence: 99%

The Renaissance of Luminescent Solar Concentrators: The Role of Inorganic Nanomaterials

Mazzaro

Vomiero

2018

Advanced Energy Materials

130

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While luminescent solar concentrators (LSCs) have a simple architecture—a transparent matrix embedding a luminescent fluorophore coupled with solar cells at the lateral side of the LSC slab—multiple paths for possible light losses exist. These are inherently interconnected, and in the past, limited the interest in this device, due to the gap between the theoretical possibilities and experimental achievements. This gap was a result, primarily, of the optical features of the luminescent dyes, since conventional organic luminophores are affected by limited performance in LSC devices. The rise of a wide portfolio of optically active inorganic nanomaterials in the last decade provides an alternative to organic dyes and has lead to a renaissance in the role of LSCs among the unconventional solar energy conversion devices. This paper reviews the latest results in the development of LSCs based on different classes of nanomaterials, focusing on the specific features and critically analyzing the pros and cons of the proposed structures. Particular attention is devoted to the role of the luminescence properties, e.g., the Stokes shift and the photoluminescence quantum yield, with respect to the performance of the LSC device. Future challenges to the successful employment of these devices for building integrated photovoltaics are also discussed.

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“…Early investigations of LSCs were pioneered by Batchelder, et al using 18 different dyes , where they found that the small Stokes shifts of the dyes leading to reabsorption on large area plates were limiting the achievable light concentration in their devices. A more comprehensive work by Friedman and Parent exhaustively investigated over 200 dyes and polymer matrices to find the most optimal dye and plastic matrix combinations. In these reports, there is a consensus that a dye with a large Stokes shift and high PLQY is a necessity to maximize the light concentration of LSCs.…”

Section: Introductionmentioning

confidence: 99%

Emissive Molecular Aggregates and Energy Migration in Luminescent Solar Concentrators

et al. 2016

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Luminescent solar concentrators (LSCs) are light harvesting devices that are ideally suited to light collection in the urban environment where direct sunlight is often not available. LSCs consist of highly luminescent compounds embedded or coated on a transparent substrate that absorb diffuse or direct solar radiation over a large area. The resulting luminescence is trapped in the waveguide by total internal reflection to the thin edges of the substrate where the concentrated light can be used to improve the performance of photovoltaic devices. The concept of LSCs has been around for several decades, and yet the efficiencies of current devices are still below expectations for commercial viability. There are two primary challenges when designing new chromophores for LSC applications. Reabsorption of dye emission by chromophores within the waveguide is a significant loss mechanism attenuating the light output of LSCs. Concentration quenching, particularly in organic dye systems, restricts the quantity of chromophores that can be incorporated in the waveguide thus limiting the light absorbed by the LSC. Frequently, a compromise between increased light harvesting of the incident light and decreasing emission quantum yield is required for most organic chromophore-based systems due to concentration quenching. The low Stokes shift of common organic dyes used in current LSCs also imposes another optimization problem. Increasing light absorption of LSCs based on organic dyes to achieve efficient light harvesting also enhances reabsorption. Ideally, a design strategy to simultaneously optimize light harvesting, concentration quenching, and reabsorption of LSC chromophores is clearly needed to address the significant losses in LSCs. Over the past few years, research in our group has targeted novel dye structures that address these primary challenges. There is a common perception that dye aggregates are to be avoided in LSCs. It became apparent in our studies that aggregates of chromophores exhibiting aggregation-induced emission (AIE) behavior are attractive candidates for LSC applications. Strategic application of AIE chromophores has led to the development of the first organic-based transparent solar concentrator that harvests UV light as well as the demonstration of reabsorption reduction by taking advantage of energy migration processes between chromophores. Further developments led us to the application of perylene diimides using an energy migration/energy transfer approach. To prevent concentration quenching, a molecularly insulated perylene diimide with bulky substituents attached to the imide positions was designed and synthesized. By combining the insulated perylene diimide with a commercial perylene dye as an energy donor-acceptor emitter pair, detrimental luminescence reabsorption was reduced while achieving a high chromophore concentration for efficient light absorption. This Account reviews and reinspects some of our recent work and the improvements in the field of LSCs.

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Luminescent solar concentrator development: Final subcontract report, 1 June 1982-31 December 1984

Cited by 8 publications

References 6 publications

Characterization and reduction of reabsorption losses in luminescent solar concentrators

Characterization and reduction of reabsorption losses in luminescent solar concentrators

The Renaissance of Luminescent Solar Concentrators: The Role of Inorganic Nanomaterials

Emissive Molecular Aggregates and Energy Migration in Luminescent Solar Concentrators

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