Luminescent solar concentrators: boosted optical efficiency by polymer dielectric mirrors

Iasilli, Giuseppe; Francischello, Roberto; Lova, Paola; Silvano, Selena; Surace, Alba; Pesce, G; Alloisio, Marina; Patrini, M.; Shimizu, Masaki; Comoretto, Davide; Pucci, Andrea

doi:10.1039/c8qm00595h

Cited by 57 publications

(46 citation statements)

References 55 publications

(75 reference statements)

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“…The effect of such roughness appears, however, comparable to that observed in the metal oxide nanoparticle multilayers that are successfully applied to a variety of fields, including sensing, [62] switchers, [44] and photon control in photovoltaics [6] (aside from lasing and light emission control [58,[63][64][65]). On the other hand, polymer systems possess mechanical properties such as a level of flexibility that is inconceivable within inorganic structures [21,35,36,66].…”

Section: Methodsmentioning

confidence: 99%

“…These structures consist of dielectric lattices made of thin film with different refractive indexes, alternated periodically, that interact with light generating specific frequency regions forbidden photon propagation, namely photonic band gaps (PBGs). Microcavities and DBRs were demonstrated for several applications including photon recycling in photovoltaics [36], sensing [35,[37][38][39][40][41][42] and optical switchers [43][44][45]. With regards to emission control, these planar lattices are of interest thanks to the spectral and directional redistribution of the photoluminescence oscillator strength [46], as already demonstrated for polymers and organic dyes [47][48][49][50][51][52][53][54][55] as well as inorganic emitters [54,56].…”

Section: Introductionmentioning

confidence: 92%

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Solution Processed Polymer-ABX4 Perovskite-Like Microcavities

et al. 2019

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Thanks to solution processability and broad emission in the visible spectral range, 2D hybrid perovskite-like materials are interesting for the realization of large area and flexible lighting devices. However, the deposition of these materials requires broad-spectrum solvents that can easily dissolve most of the commercial polymers and make perovskites incompatible with flexible photonics. Here, we demonstrated the integration of broadband-emitting (EDBE)PbCl4 (where EDBE = 2,2-(ethylenedioxy)bis(ethylammonium)) thin films with a solution-processed polymer planar microcavities, employing a sacrificial polymer multilayer. This approach allowed for spectral and angular redistribution of the perovskite-like material, photoluminescence, that can pave the way to all-solution-processed and flexible lightning devices that do not require complex and costly fabrication techniques.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 92%

Solution Processed Polymer-ABX4 Perovskite-Like Microcavities

et al. 2019

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“…[220] Band stop filters made of high dielectric constant materials have been suggested as a possible solution to limit photon escape through the loss cone [39,41] and investigated by several groups. [70,71,[220][221][222][223][224][225][226] A commercial polymer opal photonic filter has been reported to increase the optical efficiency of a 50 cm 2 LSC from 2.6% to 3.1%. [217,221] Debije and co-workers reported that a cholesteric mirror separated by an air gap from the top of a LSC reduces the surface losses and leads to a 12% increase of η opt .…”

Section: Recent Technological Advancesmentioning

confidence: 99%

“…[225] More recently, it was reported that Bragg stacks with photonic band-gap tuned to the long wavelength side of the dye emission spectrum lead to an increase of η opt from 9.4% to 10.3% (C = 0.75-0.82) of a 2.4 × 2.4 × 0.3 cm LSC (G = 8). [226]…”

Section: Recent Technological Advancesmentioning

confidence: 99%

Luminescent Solar Collectors: Quo Vadis?

Roncali

2020

Advanced Energy Materials

106

111

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Luminescent solar concentrators (LSCs) are optical systems that absorb, convert, and concentrate solar light by means of photoluminescence of an emitting material embedded in a transparent waveguide. LSCs combine large possibilities of variation of shape, flexibility, color, and transparency and can operate under direct or diffuse light. LSCs were actively investigated in the period 1975–1985 in view of photovoltaic (PV) conversion. After 20 years of sleep, research on LSCs has reemerged in the first years of the millennium driven by their potential application for PV conversion in built environment. Research on LSCs aims at the development of new active and passive components, namely emitting and light‐guiding materials, and at the reduction of the loss factors associated with the elemental processed involved in the operation in order to improve power conversion efficiency. After a brief historical account, the operating principles, characterization, components, technology, and applications are reviewed. Finally, the performance of LSCs are critically discussed in a global perspective with particular emphasis on the basic contradiction between light concentration and conversion efficiency leading to some suggestions for future development of the topic.

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“…Actually, large area and industrial fabrications have already been reported for colloidal opals that are made of self-assembled microspheres [7] and for multilayered distributed Bragg reflectors (DBRs) [8][9][10]. The latter are being increasingly studied for light management applications [11][12][13][14] and sensing purposes. Unfortunately, polymers offer refractive index values (n) in the transparency region ranging from 1.35 for fluorinated compounds to about 1.7 for aromatic non-conjugated species [2].…”

Section: Introductionmentioning

confidence: 99%

High Refractive Index Inverse Vulcanized Polymers for Organic Photonic Crystals

et al. 2020

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Photonic technologies are nowadays dominated by highly performing inorganic structures that are commonly fabricated via lithography or epitaxial growths. Unfortunately, the fabrication of these systems is costly, time consuming, and does not allow for the growth of large photonic structures. All-polymer photonic crystals could overcome this limitation thanks to easy solubility and melt processing. On the other hand, macromolecules often do not offer a dielectric contrast large enough to approach the performances of their inorganic counterparts. In this work, we demonstrate a new approach to achieve high dielectric contrast distributed Bragg reflectors with a photonic band gap that is tunable in a very broad spectral region. A highly transparent medium was developed through a blend of a commercial polymer with a high refractive index inverse vulcanized polymer that is rich in sulfur, where the large polarizability of the S–S bond provides refractive index values that are unconceivable with common non-conjugated polymers. This approach paves the way to the recycling of sulfur byproducts for new high added-value nano-structures.

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Luminescent solar concentrators: boosted optical efficiency by polymer dielectric mirrors

Cited by 57 publications

References 55 publications

Solution Processed Polymer-ABX4 Perovskite-Like Microcavities

Solution Processed Polymer-ABX4 Perovskite-Like Microcavities

Luminescent Solar Collectors: Quo Vadis?

High Refractive Index Inverse Vulcanized Polymers for Organic Photonic Crystals

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