Effect of polymer matrix on photo-stability of photo-luminescent dyes in multi-layer polymeric structures

Baumberg, I.; Berezin, Oleg; Drabkin, A.; Gorelik, B.A.; Kogan, L. I.; Voskobojnik, M.; Zaidman, M.

doi:10.1016/s0141-3910(01)00119-7

Cited by 35 publications

(28 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[113] There have been coumarins tested with moderate to very good quantum yields: Coumarin Red G has a quantum yield of over 80% [116] (87% was also reported [40] ), while the quantum yield of coumarin 540A and CRS040 have been reported as nearly unity (98%). [40,114] Even though the photostability of coumarins have proven to be better than of rhodamines, they still have been reported to have reduced stability in comparison to perylene-based dyes. [40] Perylene dyes and their derivates, like perylene bisimides, perylenebisimidazoles, and (iso)violanthrones, are known for their intense fluorescence and good photostability.…”

Section: Organic Dyesmentioning

confidence: 99%

“…[48] Thioxanthene dye D 315 orange, Lactone dye D 838 yellow, and Pyrromethene dye 580 have been shown to be relatively unstable towards illumination with visible light. [40,114] IR-144 (a dicarbocyanine) is only mentioned in the paper of Batchelder; [48] it appears to have a reasonable Stokes shift and absorption coefficient, but no further information on the performance of this dye in LSCs is available.…”

Section: Organic Dyesmentioning

confidence: 99%

“…Numerous studies have been performed on the photostability of these organic dyes: [40,49,96,111,114,116,[119][120][121][126][127][128]131] much depends on the processing conditions and polymeric environment of the fluorophore. Photodegradation of dyes in polymers can occur in two ways: 1) by direct interaction of the dye molecule with the sunlight, leading to decomposition, or 2) by the attack on a dye molecule by an active species formed due to photodecomposition of a residual molecule in the polymer matrix or by singlet oxygen.…”

Section: Organic Dyesmentioning

confidence: 99%

“…Photodegradation of dyes in polymers can occur in two ways: 1) by direct interaction of the dye molecule with the sunlight, leading to decomposition, or 2) by the attack on a dye molecule by an active species formed due to photodecomposition of a residual molecule in the polymer matrix or by singlet oxygen. [114] These residual molecules are mostly materials used during polymerization or processing of the matrix material. Two examples of reduced luminescence in LSCs caused by other molecules present in the polymer matrix under solar illumination are photoreduction, where the dye in its excited state takes an electron from an electron donor, forming a nonradiative stable anion, and photo-oxidation where the dye in its excited state donates an electron to an acceptor, forming a nonradiative cation.…”

Section: Organic Dyesmentioning

confidence: 99%

See 3 more Smart Citations

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

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.

show abstract

Section: Organic Dyesmentioning

confidence: 99%

Section: Organic Dyesmentioning

confidence: 99%

Section: Organic Dyesmentioning

confidence: 99%

Section: Organic Dyesmentioning

confidence: 99%

See 2 more Smart Citations

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

show abstract

“…The most common organic dyes for LSC include rhodamines, [53][54][55][56][57][58][59] coumarins, [59][60][61][62] lumogens, [63][64][65] cyanine salts [3] and perylenebismides…”

Section: Practical Consideration For Scaling Of Transparent Luminescementioning

confidence: 99%

Limits of Visibly Transparent Luminescent Solar Concentrators

Yang

Lunt

2017

Advanced Optical Materials

113

100

View full text Add to dashboard Cite

surfaces into energy harvesting resources. This new approach to visibly transparent LSCs was developed by exploiting the nature of excitonic semiconductors to optimize the use of this light-exposed surface area without compromising its existing functionality, thereby avoiding the aesthetic tradeoffs that can hinder adoption. Recent work has demonstrated devices that selectively harvest different parts of the solar spectrum including i) ultraviolet (UV) absorption, with massive downconverted luminescence deeper into the NIR (>400 nm) [4] and ii) near-infrared (NIR) absorption, with even deeper luminescence in the NIR. [3] This work has been subsequently followed by a number of other groups. [8][9][10][11][12] In contrast to transparent photovoltaics, which have also been developed to exploit this untapped area, [13][14][15] this new concentrator approach offers an alternative pathway whereby energy is transported optically, offering a simple route to large-area manufacturing, high defect tolerance, angle independent performance, and low-level energy cost. In this progress report we discuss the theoretical limits of transparent LSCs, idealized configurations, scalability, and properties of enabling materials. Operating Principles of LSCsLuminescent solar concentrators operate based on the following mechanisms (see Figure 1a): a portion of solar spectrum is absorbed in a luminescent dye (or "luminophore") [16] embedded in a transparent waveguide. That absorbed solar energy is then re-emitted at another wavelength isotropically in all directions within the waveguide, provided the oscillators are not preferentially oriented. Due to the index of refraction difference between the waveguide and the ambient environment the re-emitted photons are predominately trapped by total internal reflection, causing them to be directed towards the waveguide edges where they can be converted to electrical power in an edge mounted photovoltaic cell. The overall system power conversion efficiency, η LSC , is then given by:where η Opt is the optical efficiency (number of photons reaching the waveguide edge)/(number of photons incident on the waveguide), R is the front face reflection, η Abs is the solar spectrum Visibly transparent solar harvesting surfaces are an exciting new approach to harvesting solar energy around buildings and mobile electronics to improve their efficiency and autonomy without impacting their appearance. The recent demonstration of ultraviolet (UV) and near-infrared (NIR) selective light harvesters have enabled transparent luminescent solar concentrators (LSCs) that boast unparalleled scalability, flexibility, aesthetic quality, and affordability. Consequently, the question of the efficiency limits has emerged in these new systems. In this perspective, the theoretical efficiency limits of these concentrator systems are reviewed and practical considerations are outlined to approach these limits. For UV and UV/NIR selective harvesting single-junction transparent LSCs are constrained thermodynamically to 21%, which i...

show abstract