Bent fluorescent solar concentrators (BFSCs): Spectroscopy, stability and outdoor performance

El-Shaarawy, M.G.; El-Bashir, S.M.; Hammam, M.; El‐Mansy, M. K.

doi:10.1016/j.cap.2007.02.002

Cited by 24 publications

(12 citation statements)

References 16 publications

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“…7. As a result of nanooxide doping; it is noted that the fluorescence signal is clearly amplified with a remarkable blue shift in good agreement with our published work [24]. This can be attributed to the chemisorption of the dye molecules on the surface of nano-oxide fillers which lead to the caging of dye molecule on the nano-oxide surface [38].…”

Section: Photophysical Properties and Chemisorption Effectsupporting

confidence: 78%

“…The exponential curves showed two degradation steps; the first concerns the dye molecules which may exist outside the free volume of PMMA chains and photo-degrade at a rate constant "R". The second mechanism concerns the dye molecules that exist inside polymer free volume and those chemisorbed on the nano-oxide filler surface and [24]. The values of "R" and C 2 were determined by least square fitting of equation (7) using 1st order exponential decay function as depicted on Fig.…”

Section: Weathering Stability Tests Of Nanohybrid Lsc Filmsmentioning

confidence: 99%

“…Fluorescent PMMA syrup of average molecular weight 1,000,000 g/mol; was prepared as described before [24], using methylmethacrylate (MMA) monomer (Merck, Germany), 0.05 wt% AIBN initiator (Dupont, USA), 200 ppm of fluorescent dye (MAC-ROLEX Fluorescent Red G, Bayer, Germany). The viscosity of the resulting (PMMA-MMA) syrup was determined using a brook field DV-II þ viscometer (USA) and was found to be 36 cP.…”

Section: Preparation Of Fluorescent Pmma Syrupmentioning

confidence: 99%

“…The absorption efficiency, h abs , defined as the fraction of solar photons absorbed by LSC film can be calculated as [24],…”

Section: Efficiency Parameters Of Nanohybrid Lsc Films For Greenhousementioning

confidence: 99%

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Red photoluminescent PMMA nanohybrid films for modifying the spectral distribution of solar radiation inside greenhouses

et al. 2016

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a b s t r a c tLuminescent solar concentrator (LSC) films based on Polymethylmethacrylate (PMMA) nanohybrids were prepared using free radical polymerization of MMA incorporated with oxide nanoparticles; SiO 2 , ZnO and TiO 2 . The effect of nano-oxide type was studied by Fourier transform infrared spectroscopy (FT-IR), UV eVis absorption and fluorescence spectroscopy measurements. The performance of LSC nanohybrid films was evaluated and optimized for photoselective greenhouse cladding applications in order to increase the plant productivity by changing the solar spectrum. It was found that ZnO nanohybrid LSC film had offered the best spectral properties for photosynthetic active radiation besides their excellent resistance to photo and thermal degradation especially in hot countries like KSA. Regarding thermal efficiency, the highest infrared (IR) efficiency has been found for silica nanohybrid LSC film, which reached about 83%. This result is promising to improve thermal efficiency in greenhouse claddings in cold regions and thermal covering systems like solar dryers and solar desalination systems.

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Section: Photophysical Properties and Chemisorption Effectsupporting

confidence: 78%

Section: Weathering Stability Tests Of Nanohybrid Lsc Filmsmentioning

confidence: 99%

Section: Preparation Of Fluorescent Pmma Syrupmentioning

confidence: 99%

“…The absorption efficiency, h abs , defined as the fraction of solar photons absorbed by LSC film can be calculated as [24],…”

Section: Efficiency Parameters Of Nanohybrid Lsc Films For Greenhousementioning

confidence: 99%

See 2 more Smart Citations

Red photoluminescent PMMA nanohybrid films for modifying the spectral distribution of solar radiation inside greenhouses

et al. 2016

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“…A large fraction of the emitted light is trapped by total internal reflection and concentrated towards the edges of the collector. This concentrated edge-light is predominantly used for photovoltaic electricity generation [1][2][3][4][5][6], although it has also been used for heat generation [7] and lighting [8].…”

Section: Introductionmentioning

confidence: 99%

Absorption tails and extinction in luminescent solar concentrators

Earp¹,

Franklin²,

Smith³

2011

Solar Energy Materials and Solar Cells

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Non-UV photoexposure of luminescent solar concentrators (LSC's) can produce photoproducts which causing additional extinction at wavelengths somewhat longer than the main dye absorption peak. This is extremely deleterious to luminous output in collectors of useful lengths. An experimental method that enables the subdivision of tails extinction in an LSC into absorbed and scattered components is described. The relevant theory is outlined, and experimental results are presented for a PMMA LSC containing Lumogen F083 dye. For this sample, tails absorption increased significantly with outdoor exposure, while tails scattering remained constant. Further measurements indicate that LSC luminous output is around five times more sensitive to tails absorption than to fluorescence quenching.

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