Optical studies on some dyes for liquid solar concentrators

Kondepudi, Ramesh; Srinivasan, S. K.

doi:10.1016/0165-1633(90)90010-x

Cited by 20 publications

(8 citation statements)

References 8 publications

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“…This light is absorbed by luminescent molecules (which could be organic dyes, inorganic phosphors, or quantum dots, as we describe later in this review), which are embedded in the waveguide, applied in a separate layer on the top or bottom of the waveguide, or contained in a liquid solution between two glass plates. [17,[24][25][26] The absorbed light is re-emitted at a longer wavelength and a fraction of the re-emitted light is trapped in the waveguide by total internal reflection, becoming concentrated along the edges of the plate. Small PV cells can be attached to the edges is the reflection efficiency of the waveguide determined by the smoothness of the waveguide surface, and η self is the transport efficiency of the waveguided photons related to re-absorption of the emitted photons by another luminophore.…”

Section: Working Principle Of the Luminescent Solar Concentratormentioning

confidence: 99%

“…The basic LSC design allows sunlight to penetrate the top surface of an inexpensive plastic or glass waveguide. This light is absorbed by luminescent molecules (which could be organic dyes, inorganic phosphors, or quantum dots, as we describe later in this review), which are embedded in the waveguide, applied in a separate layer on the top or bottom of the waveguide, or contained in a liquid solution between two glass plates 17, 24–26. The absorbed light is re‐emitted at a longer wavelength and a fraction of the re‐emitted light is trapped in the waveguide by total internal reflection, becoming concentrated along the edges of the plate.…”

Section: Introductionmentioning

confidence: 99%

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Thirty Years of Luminescent Solar Concentrator Research: Solar Energy for the Built Environment

Debije

Verbunt

2011

Advanced Energy Materials

832

689

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Research on the luminescent solar concentrator (LSC) over the past thirty‐odd years is reviewed. The LSC is a simple device at its heart, employing a polymeric or glass waveguide and luminescent molecules to generate electricity from sunlight when attached to a photovoltaic cell. The LSC has the potential to find extended use in an area traditionally difficult for effective use of regular photovoltaic panels: the built environment. The LSC is a device very flexible in its design, with a variety of possible shapes and colors. The primary challenge faced by the devices is increasing their photon‐to‐electron conversion efficiencies. A number of laboratories are working to improve the efficiency and lifetime of the LSC device, with the ultimate goal of commercializing the devices within a few years. The topics covered here relate to the efforts for reducing losses in these devices. These include studies of novel luminophores, including organic fluorescent dyes, inorganic phosphors, and quantum dots. Ways to limit the surface and internal losses are also discussed, including using organic and inorganic‐based selective mirrors which allow sunlight in but reflect luminophore‐emitted light, plasmonic structures to enhance emissions, novel photovoltaics, alignment of the luminophores to manipulate the path of the emitted light, and patterning of the dye layer to improve emission efficiency. Finally, some possible ‘glimpses of the future’ are offered, with additional research paths that could result in a device that makes solar energy a ubiquitous part of the urban setting, finding use as sound barriers, bus‐stop roofs, awnings, windows, paving, or siding tiles.

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Section: Working Principle Of the Luminescent Solar Concentratormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thirty Years of Luminescent Solar Concentrator Research: Solar Energy for the Built Environment

Debije

Verbunt

2011

Advanced Energy Materials

832

689

View full text Add to dashboard Cite

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“…1), and show great sensitivity to the solvent environment because of their ionizable characters. The photophysics of fluorescein derivatives is an active field of research because of their importance as laser materials [9][10][11][12][13][14] and as a solar energy concentrator [15] and probes to study biological systems [16]. As reported earlier [17][18][19][20], fluorescein-Na in its ground state can exist in four different forms, namely cation, neutral, monoanion and dianion, and hence it shows great sensitivity to the solvent environment (varied pH).…”

Section: Introductionmentioning

confidence: 99%

Dual fluorescence and laser emissions from fluorescein-Na and eosin-B

Math

Naik

Suresh

et al. 2006

Journal of Luminescence

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“…Dielectric analysis provides both of these required capabilities 10. In addition, a necessary requirement for an LSC system is a large stokes shift, which is known to be a function of the dielectric constant (ϵ′) and the refractive index of the substrate material 11…”

Section: Introductionmentioning

confidence: 99%

Electrical conduction and dielectric properties of poly(methyl methacrylate)/perylene solar concentrators

El-Shaarawy

Mansour

El-Bashir

et al. 2003

J of Applied Polymer Sci

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Poly(methyl methacrylate) doped with fluorescent perylene dye was prepared by both radical polymerization of methyl methacrylate and solvent casting from polymer solutions. The samples were characterized by differential scanning calorimetry, Fourier transform infrared spectroscopy, electrical conductivity, and dielectric properties. Both conductivity and dielectric properties were measured in the temperature range 303-433 K and the frequency range 10 3 to 5 ϫ 10 6 Hz. The results show that the directcurrent electrical conductivity increased by increasing dye content in solvent-cast samples, whereas it decreased radically polymerized samples. The results of alternating-current conductivity suggest electron hopping between filled and empty localized states. The study of dielectric properties showed two relaxation peaks corresponding to the dipole segmental and dipole group losses. Explanations based on the polymer free volume and acid-base interactions were proposed to examine the influence of the sample preparation and perylene dye concentration on the glass-transition temperature and dielectric relaxation of the samples. The obtained results recommend the thermal and molecular stability of luminescent solar concentrator (LSC) matrices prepared by radical polymerization over those prepared by solvent casting.

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Optical studies on some dyes for liquid solar concentrators

Cited by 20 publications

References 8 publications

Thirty Years of Luminescent Solar Concentrator Research: Solar Energy for the Built Environment

Thirty Years of Luminescent Solar Concentrator Research: Solar Energy for the Built Environment

Dual fluorescence and laser emissions from fluorescein-Na and eosin-B

Electrical conduction and dielectric properties of poly(methyl methacrylate)/perylene solar concentrators

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