Compensation of self-absorption losses in luminescent solar concentrators by increasing luminophore concentration

Krumer, Zachar; Sark, W.G.J.H.M. van; Schropp, R.E.I.; Donegá, Celso de Mello

doi:10.1016/j.solmat.2017.04.010

Cited by 63 publications

(42 citation statements)

References 22 publications

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“…Fluorophores with aggregation induced emission features (AIEgens) are the best candidates for the LSC technology since highly emissive polymer slabs are theoretically gathered also at high fluorophore contents, that is useful for maximizing the solar harvesting characteristics . Moreover, the easy design of the AIEgens backbones allows for the utilization of economic and scalable synthetic routes aimed at introducing in the organic core donor‐acceptors moieties that favour the downshifting of the emission towards the range of the highest light/electric current conversion by the Si‐based PV cell .…”

Section: Aie Fluorophores For Lscsmentioning

confidence: 99%

Luminescent Solar Concentrators Based on Aggregation Induced Emission

Pucci

2018

Israel Journal of Chemistry

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A promising path to cost‐effective photovoltaic (PV) systems is sunlight concentration. Over classical non‐imaging geometrical concentrators, luminescent solar concentrators (LSCs) possess several advantages: low cost and weight, elevated theoretical concentration factors and aptitude to efficiently working with diffuse light without tracking or cooling equipment. Although considerable progress has been made, current LSC‐PV systems attain low power conversion efficiencies due to critical processes that hinder their ability to deliver light to PV cells including fluorescence quenching due to dye aggregation. To overcome this issue, fluorophores with aggregation induced emission (AIEgens) have been proposed thanks to their high Stokes shift and quantum yield in the solid state. In this review, the current state of knowledge concerning the preparation of LSCs based on AIEgens is summarized with special reference on the strategy adopted aimed at increasing the absorption bandwidth while maximizing the solar collection.

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Section: Aie Fluorophores For Lscsmentioning

confidence: 99%

Luminescent Solar Concentrators Based on Aggregation Induced Emission

Pucci

2018

Israel Journal of Chemistry

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“…In our case, it appears that the FRET saturation level was reached at the concentration of QD150, approximately. Self-absorption is a known drawback of quantum materials [43][44][45]. Most QDs have a partially overlapping absorption and emission spectrum.…”

Section: Resultsmentioning

confidence: 99%

Fabrication and Luminescent Properties of Zn–Cu–In–S/ZnS Quantum Dot Films under UV Excitation

et al. 2019

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Quantum dots (QDs) are quite interesting materials due to their unique chemical and physical properties. ZnCuInS/ZnS QDs can be produced either in hydrophobic or hydrophilic form, are non-toxic, and thus favorable for studies in the area of biology. Poly(methyl methacrylate) (PMMA) is a well-known biocompatible resin which is widely used in dentistry, ophthalmology, and orthopedic surgery. Four composite PMMA films of ZnCuInS/ZnS nanocrystals with maximum emission at 530 nm and concentrations of 1.0, 4.0, 6.0, and 10.0 %w/v, were prepared. X-ray irradiation was used to evaluate the volume homogeneity of the final samples, as a measure of QD dispersion. The luminescent efficiency was evaluated, under ultraviolet (UV) irradiation. The process of UV irradiation involved the experimental measurement of the forward luminescent light, as well as the backward luminescent light, in order to accurately calculate the energy quantum efficiency (EQE) of ZnCuInS/ZnS QDs. Reflected UV radiation was also measured, and results showed that it ranges from 2% to 6% approximately as the QD concentration rises from 1.0 %w/v to 10.0 %w/v. Beyond 6.0 %w/v, the reflected UV radiation remains essentially unchanged. Additionally, the reflected UV radiation remained unaffected as the power of the incident UV increased. Approximately 9% of incident UV radiation passed through the 1.0 %w/v sample, whereas for the samples with higher ZnCuInS/ZnS concentration, 0% UV radiation passed through. The EQE reached a maximum of about 45% with the 10.0 %w/v sample, while it remained practically unaffected relative to the increase of the emitted UV power. The homogeneity measurements revealed that the coefficient of variation (CV) increased with increasing concentration, for the 1.0, 4.0, and 6.0 %w/v samples. The minimum CV was obtained for the sample of 10.0 %w/v due to the incorporation of sonication in the final product, during the fabrication process.

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“…Multiple developments in the materials science of advanced luminescent materials for LSC-type applications and solar window devices have been reported in the recent literature and reviews, e.g., [88][89][90][91][92][93][94][95][96][97][98]. The authors of [88] reviewed the current state of the field in luminescent nanomaterials for LSC, and graphically represent the photon collection mechanisms and the various loss effects as "photon destination map", which illustrates through modelling that the "escape cone losses" related to multiple total internal reflections and the associated processes, can be as high as 42% in practice, in a system where theoretically-evaluated escape-cone loss would have been near 25%.…”

Section: Progress In Semitransparent Concentrator-type Solar Window Tmentioning

confidence: 99%

“…At present, a strong research focus and momentum are directed towards the development of advanced semiconductor nanocrystals and quantum dot (QD) materials, to enable strong reductions in self-absorption losses simultaneously with improved absorption efficiency in the near-infrared range, and to ensure greater environmental stability and light-fastness of luminophores [83,84,[88][89][90][91][92][93]. Some drawbacks of inorganic QDs are discussed in [91], in particular, their susceptibility to deactivation by oxygen, often small Stokes shifts, and limited quantum efficiency, together with toxicity due to using materials, such as lead or cadmium.…”

Section: Progress In Semitransparent Concentrator-type Solar Window Tmentioning

confidence: 99%

“…Some drawbacks of inorganic QDs are discussed in [91], in particular, their susceptibility to deactivation by oxygen, often small Stokes shifts, and limited quantum efficiency, together with toxicity due to using materials, such as lead or cadmium. Organic dyes from the BASF Lumogen (Ludwigshafen, Germany) product range are still the mainstream LSC materials [91], and efforts at optimizing their concentrations and mixes are ongoing [89].…”

Section: Progress In Semitransparent Concentrator-type Solar Window Tmentioning

confidence: 99%

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Recent Developments in Solar Energy-Harvesting Technologies for Building Integration and Distributed Energy Generation

2019

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We present a review of the current state of the field for a rapidly evolving group of technologies related to solar energy harvesting in built environments. In particular, we focus on recent achievements in enabling the widespread distributed generation of electric energy assisted by energy capture in semi-transparent or even optically clear glazing systems and building wall areas. Whilst concentrating on recent cutting-edge results achieved in the integration of traditional photovoltaic device types into novel concentrator-type windows and glazings, we compare the main performance characteristics reported with these using more conventional (opaque or semi-transparent) solar cell technologies. A critical overview of the current status and future application potential of multiple existing and emergent energy harvesting technologies for building integration is provided.

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Compensation of self-absorption losses in luminescent solar concentrators by increasing luminophore concentration

Cited by 63 publications

References 22 publications

Luminescent Solar Concentrators Based on Aggregation Induced Emission

Luminescent Solar Concentrators Based on Aggregation Induced Emission

Fabrication and Luminescent Properties of Zn–Cu–In–S/ZnS Quantum Dot Films under UV Excitation

Recent Developments in Solar Energy-Harvesting Technologies for Building Integration and Distributed Energy Generation

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