scholarly journals Transparent Luminescent Solar Concentrators Using Ln3+-Based Ionosilicas Towards Photovoltaic Windows

Energies ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 451 ◽  
Author(s):  
Ana Frias ◽  
Marita Cardoso ◽  
Ana Bastos ◽  
Sandra Correia ◽  
Paulo André ◽  
...  
Keyword(s):  
Organic Dyes ◽  
Stokes Shift ◽  
Urban Environments ◽  
Optically Active ◽  
Lanthanide Ions ◽  
Zero Energy ◽  
Solar Concentrators ◽  
Sustainable Buildings ◽  
Luminescent Solar Concentrators ◽  
Transparent Coatings

The integration of photovoltaic (PV) elements in urban environments is gaining visibility due to the current interest in developing energetically self-sustainable buildings. Luminescent solar concentrators (LSCs) may be seen as a solution to convert urban elements, such as façades and windows, into energy-generation units for zero-energy buildings. Moreover, LSCs are able to reduce the mismatch between the AM1.5G spectrum and the PV cells absorption. In this work, we report optically active coatings for LSCs based on lanthanide ions (Ln3+ = Eu3+, Tb3+)-doped surface functionalized ionosilicas (ISs) embedded in poly(methyl methacrylate) (PMMA). These new visible-emitting films exhibit large Stokes-shift, enabling the production of transparent coatings with negligible self-absorption and large molar extinction coefficient and brightness values (~2 × 105 and ~104 M−1∙cm−1, respectively) analogous to that of orange/red-emitting organic dyes. LSCs showed great potential for efficient and environmentally resistant devices, with optical conversion efficiency values of ~0.27% and ~0.34%, respectively.

scholarly journals POF-Based Solar Concentrators Incorporating Dyes and Europium Chelates

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2667
Author(s):  
Ander Vieira ◽  
Jon Arrue ◽  
Begoña García-Ramiro ◽  
Felipe Jiménez ◽  
María Asunción Illarramendi ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Organic Dyes ◽  
Radiative Energy ◽  
Quantum Yields ◽  
Solar Concentrators ◽  
Europium Ion ◽  
Luminescent Solar Concentrators ◽  
Simplifying Assumptions ◽  
Europium Chelates ◽  
Polymer Optical Fibers

In this paper, useful models that enable time-efficient computational analyses of the performance of luminescent solar concentrators (LSCs) are developed and thoroughly described. These LSCs are based on polymer optical fibers codoped with organic dyes and/or europium chelates. The interest in such dopants lies in the availability of new dyes with higher quantum yields and in the photostability and suitable absorption and emission bands of europium chelates. Time-efficiency without compromising accuracy is especially important for the simulation of europium chelates, in which non-radiative energy transfers from the absorbing ligands to the europium ion and vice versa are so fast that the discretization in time, in the absence of some simplifying assumptions, would have to be very fine. Some available experimental results are also included for the sake of comparison.

scholarly journals Synthesis of new bis[1-(thiophenyl)propynones] as potential organic dyes for colorless luminescent solar concentrators (LSCs)

2020 ◽  
Vol 174 ◽  
pp. 108100 ◽  
Author(s):  
Gianluigi Albano ◽  
Tony Colli ◽  
Luigi Nucci ◽  
Rima Charaf ◽  
Tarita Biver ◽  
...  
Keyword(s):  
Organic Dyes ◽  
Solar Concentrators ◽  
Luminescent Solar Concentrators

First demonstration of the use of very large Stokes shift cycloparaphenylenes as promising organic luminophores for transparent luminescent solar concentrators

2019 ◽  
Vol 55 (21) ◽  
pp. 3160-3163 ◽  
Author(s):  
Paolo Della Sala ◽  
Nunzio Buccheri ◽  
Alessandro Sanzone ◽  
Mauro Sassi ◽  
Placido Neri ◽  
...  
Keyword(s):  
Stokes Shift ◽  
Solar Concentrators ◽  
Large Stokes Shift ◽  
Luminescent Solar Concentrators ◽  
Organic Luminophores

The use of [n]CPP derivatives as luminophores in LSC-devices minimises reabsorption losses.

scholarly journals Enhancement of Fluorescence and Photostability Based on Interaction of Fluorescent Dyes with Silver Nanoparticles for Luminescent Solar Concentrators

2017 ◽  
Vol 2017 ◽  
pp. 1-13 ◽  
Author(s):  
Sara El-Molla ◽  
A. F. Mansour ◽  
A. E. Hammad
Keyword(s):  
Silver Nanoparticles ◽  
Band Gap ◽  
Optical Band Gap ◽  
Fluorescent Dyes ◽  
Organic Dyes ◽  
X Ray Diffraction ◽  
Absorption Bands ◽  
Solar Concentrators ◽  
Luminescent Solar Concentrators ◽  
Silver Nps

For luminescent solar concentrators (LSCs), it is important to enhance the fluorescence quantum yield (FQY) and photostability. Our measurements have demonstrated that the addition of silver nanoparticles to dye solution causes broadening of absorption bands, so the spectral range of sunlight absorbed by LSC has increased. Silver nanoparticles (NPs) were characterized by X-ray diffraction (XRD) and UV-Vis absorption spectra. UV-Vis spectrum showed a single peak at 442 nm due to the surface plasmon resonance (SPR). The position of SPR peak exhibited a red shift after the sample was exposed to UV irradiation (unfiltered light). The optical band gap values have a reduction from 2.46 to 2.37 eV after irradiation for 960 minutes. Such reduction in optical band gap may be due to change in particle size calculated using Mie theory. The photostability of organic dyes used was improved after adding silver nanoparticles. The area under fluorescence spectra of dyes with silver NPs increased by 41–31% when compared with identical dye concentrations without silver nanoparticles as a result of interaction of the species with silver NPs.

scholarly journals Impact of Stokes Shift on the Performance of Near-Infrared Harvesting Transparent Luminescent Solar Concentrators

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Chenchen Yang ◽  
Jun Zhang ◽  
Wei-Tao Peng ◽  
Wei Sheng ◽  
Dianyi Liu ◽  
...  
Keyword(s):  
Near Infrared ◽  
Stokes Shift ◽  
Solar Concentrators ◽  
Luminescent Solar Concentrators

Large-area luminescent solar concentrators based on ‘Stokes-shift-engineered’ nanocrystals in a mass-polymerized PMMA matrix

2014 ◽  
Vol 8 (5) ◽  
pp. 392-399 ◽  
Author(s):  
Francesco Meinardi ◽  
Annalisa Colombo ◽  
Kirill A. Velizhanin ◽  
Roberto Simonutti ◽  
Monica Lorenzon ◽  
...  
Keyword(s):  
Stokes Shift ◽  
Large Area ◽  
Solar Concentrators ◽  
Pmma Matrix ◽  
Luminescent Solar Concentrators

High Stokes shift perylene dyes for luminescent solar concentrators

2013 ◽  
Vol 49 (16) ◽  
pp. 1618 ◽  
Author(s):  
Alessandro Sanguineti ◽  
Mauro Sassi ◽  
Riccardo Turrisi ◽  
Riccardo Ruffo ◽  
Gianfranco Vaccaro ◽  
...  
Keyword(s):  
Stokes Shift ◽  
Solar Concentrators ◽  
Luminescent Solar Concentrators

scholarly journals Flexible, Front-Facing Luminescent Solar Concentrators Fabricated from Lumogen F Red 305 and Polydimethylsiloxane

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Ian A. Carbone ◽  
Katelynn R. Frawley ◽  
Melissa K. McCann
Keyword(s):  
Thin Film ◽  
Fluorescent Dyes ◽  
Organic Dyes ◽  
Cost Effective ◽  
Power Production ◽  
Optical Measurements ◽  
Light Collection ◽  
Solar Concentrators ◽  
Luminescent Solar Concentrators ◽  
Thin Film Devices

Luminescent solar concentrators (LSCs) fabricated with transparent host materials and fluorescent organic dyes are cost effective and versatile tools for solar power production. In this study, the first flexible, front-facing LSCs utilizing Lumogen F Red 305 (LR305) and polydimethylsiloxane (PDMS) were demonstrated. Bulk-doped devices, fabricated with dye evenly distributed throughout the waveguide, were optimized for light gain with LR305 concentrations between 0.075 and 0.175 g/l. Thin-film devices, fabricated with a thin layer of luminescent material applied to the bottom side of the waveguide, were optimized between 0.5 and 0.75 g/l. The bulk-doped and thin-film devices produced light gains of 1.86 and 1.89, respectively, demonstrating that flexible designs can be developed without sacrificing power production. Bulk-doped devices proved to be less effective than thin-film devices at collecting direct light due to the placement of fluorescent dyes above the front-facing solar cell. Thin-film devices demonstrated less light collection than bulk-doped devices further from the device centers possibly due to quenching and self-absorption losses at higher dye concentrations. Light collection was minimally impacted by moderate bending in both LSC designs, suggesting that flexible, front-facing devices could be effectively deployed on curved and uneven surfaces. Finally, optical measurements of the LSC waveguides suggest that they could support plant growth underneath. Similar designs could be developed for applications in agricultural settings.

Utilizing host–guest interaction enables the simultaneous enhancement of the quantum yield and Stokes shift in organosilane-functionalized, nitrogen-containing carbon dots for laminated luminescent solar concentrators

Nanoscale ◽  
2020 ◽  
Vol 12 (46) ◽  
pp. 23537-23545
Author(s):  
Hsiu-Ying Huang ◽  
Maria Jessabel Talite ◽  
Kun-Bin Cai ◽  
Ruth Jeane Soebroto ◽  
Sheng-Hsiung Chang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Quantum Yield ◽  
Solar Energy ◽  
Carbon Dots ◽  
Stokes Shift ◽  
Solar Concentrators ◽  
Luminescent Solar Concentrators

Solar energy can be harvested using luminescent solar concentrators (LSCs) incorporated with edge-mounted solar cells without sacrificing their see-through visibility, thus facilitating the development of solar windows.

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