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

El-Molla, Sara; Mansour, Ahmed; Hammad, A.E.

doi:10.1155/2017/9701251

Cited by 7 publications

(3 citation statements)

References 29 publications

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“…Similarly, a sufficiently long durability of LSC systems during operation also represents a key asset to prove the real commercial viability of this technology. In particular, two critical aspects directly affecting the lifetime of LSCs are the chemical and physical durability of the host matrix, and the photostability of the luminescent species, both addressed by designing intrinsically stable host materials [13][14][15][16][17][18] and luminophores [19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Highly emissive fluorescent silica-based core/shell nanoparticles for efficient and stable luminescent solar concentrators

et al. 2021

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Luminescent solar concentrators (LSCs) represent a viable spectral conversion technology to maximize sunlight harvesting while promising to reduce the current gap for integration of solar cells into the built environment. In this work, novel highly emissive and photostable core-shell nanostructured luminescent species were synthesized and used in LSC devices. Such systems were obtained by entrapping Lumogen F Red 305 in silica-based shells by means of the sol-gel process using a combination of hydrophilic (tetraethyl orthosilicate) and hydrophobic (phenyl triethoxysilane) silica precursors. By tuning their relative proportions during the synthetic process, fine control over the characteristic dimensions and morphology of the obtained dye-doped core-shell nanoparticles could be achieved, leading to a maximum concentration of non-covalently entrapped fluorescent dye of ~1 wt.%. Optical characterization showed that the newly synthetized nanoparticles displayed markedly improved photoluminescence quantum yield in solid state (~ 95 %) with respect to the non-encapsulated dye (~ 2 %), as a result of an effective suppression of dye aggregation and fluorescence quenching phenomena. In addition, their excellent photostability under harsh UV light exposure was demonstrated, resulting from the protective action of the encapsulating hybrid silica-based shell, which can effectively limit photobleaching of the luminescent core. Their incorporation in thin-film LSCs led to a maximum internal photon efficiency as high as ~29%, thus providing evidence of their suitability as highly performing luminescent species with superior optical response and excellent photostability. Also, a maximum external photon efficiency as high as 2.12% was achieved. This work provides the first demonstration of silica-based encapsulation of Lumogen F Red 305 and of the application of silica-based core-shell nanoparticles in LSCs, thus paving the path to the development of a new class of highly efficient and stable nanostructured luminophores for the photovoltaic field.

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Section: Introductionmentioning

confidence: 99%

Highly emissive fluorescent silica-based core/shell nanoparticles for efficient and stable luminescent solar concentrators

et al. 2021

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“…El‐Molla et al. demonstrated an enhancement in fluorescence and photostability of fluorescent dyes with Ag nanoparticles in LSC applications [177] . A reduction in the optical band gap of Ag nanoparticles from 2.46 to 2.37 eV after UV treatment was observed, likely due to the band gap reduction in nanoparticles due to radiative effects.…”

Section: Semiconductor Quantum Dots In Lscsmentioning

confidence: 99%

Review on Colloidal Quantum Dots Luminescent Solar Concentrators

et al. 2021

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Luminescent solar concentrators (LSCs) have recently gained popularity as an effective solution to increase solar energy conversion. Utilizing LSCs together with solar cells can generate more energy at a lower cost than using only solar cells. LSCs operate by utilizing luminophores, molecules that absorb incident solar irradiation and re‐emit photons, and waveguides that redirect emitted photons to the edges of a glass or polymer slab at high concentrations. Many quantum dots (QDs) have been the focus of much research as luminophores for LSCs, owing to their high quantum yields (QYs), controllable absorption/emission spectra, good stability, and ease of synthesis. Various QDs, such as CdSe, PbS, CdS, AgInS2, Si, and C, have been modified to enhance their optical performances in LSCs, often measured by their optical efficiencies, internal/external quantum efficiencies, and power conversion efficiencies. This review appraises the latest developments in colloidal QDs—basic QDs, doped QDs, core/shell QDs, hybrid QDs, and Si‐based QD—for their applications in LSCs. Other factors that enhance an LSC's efficiency, such as altering the polymer matrix and using distributed Bragg reflectors, are discussed. The development of highly efficient, QD‐based LSCs will be essential for increasing solar energy production worldwide.

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“…To cope with this problem there is the need for fillers that do not degrade the intrinsic properties of PVA but enable it to retain its properties under these stresses. In the last few decades, several polymer nanocomposites showed excellent improvements [ 4 , 5 ]. Therefore, there may also be the potential in PVA nanocomposites to replace PVA in high performance applications.…”

Section: Introductionmentioning

confidence: 99%

Development and Investigation of High Performance PVA/NiO and PVA/CuO Nanocomposites with Improved Physical, Dielectric and Mechanical Properties

et al. 2022

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A series of polyvinyl alcohol (PVA)based composites with well dispersed nano fillers were fabricated and compared in terms of dielectric, mechanical, and optical properties. Specifically, NiO and CuO nano-fillers were utilized in a range of 0.2–0.6 wt% for thin film fabrication by solution deposition method. The characterization of nanocomposites was confirmed through FTIR, FESEM, and XRPD, whereas dielectric and mechanical properties were analyzed with respect to the filler concentrations. The bandgap of PVA/nano-filler composites reduced with an increase in NiO and CuO concentration from 0.2 to 0.6 wt%. The increase in the permittivity of the material was observed for 6 wt% of nano-fillers. The toughness of PVA/nano-filler composites was improved by increasing CuO and NiO concentration and Young’s modulus of 30.9 and 27.2 MPa for 0.6 wt% of NiO and CuO-based nanocomposite, respectively, was observed. The addition of nano-fillers showed improved optical, dielectric, and mechanical properties.

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

Cited by 7 publications

References 29 publications

Highly emissive fluorescent silica-based core/shell nanoparticles for efficient and stable luminescent solar concentrators

Highly emissive fluorescent silica-based core/shell nanoparticles for efficient and stable luminescent solar concentrators

Review on Colloidal Quantum Dots Luminescent Solar Concentrators

Development and Investigation of High Performance PVA/NiO and PVA/CuO Nanocomposites with Improved Physical, Dielectric and Mechanical Properties

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