Fluorescent J-aggregates of cyanine dyes: basic research and applications review

Bricks, Julia L.; Slominskii, Yu. L.; Panas, Ihor D; Demchenko, Alexander P.

doi:10.1088/2050-6120/aa8d0d

Cited by 304 publications

(313 citation statements)

References 289 publications

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“…So far, experiments have shown the possibility of engineering site-basis coherence into artificial systems [19,[40][41][42] and generating long-lived energy-basis coherence in natural [2][3][4][5] and artificial [43] systems. However, these experiments did not relate the observed coherences to light-harvesting efficiency, usually because they did not include acceptors to trap the excitons.…”

Section: Toward Experimental Demonstrations Of Enhancementsmentioning

confidence: 99%

Classification of Coherent Enhancements of Light-Harvesting Processes

Tomasi

Kassal

2020

J. Phys. Chem. Lett.

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In recent years, several kinds of coherence have been shown to affect the performance of lightharvesting systems, in some cases significantly improving their efficiency. Here, we classify the possible mechanisms of coherent efficiency enhancements, based on the types of coherence that can characterise a light-harvesting system and the types of processes these coherences can affect. We show that enhancements are possible only when coherences and dissipative effects are best described in different bases of states. Our classification allows us to predict a previously unreported coherent enhancement mechanism, where coherence between delocalised eigenstates can be used to localise excitons away from dissipation, thus reducing recombination and increasing efficiency.

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Section: Toward Experimental Demonstrations Of Enhancementsmentioning

confidence: 99%

Classification of Coherent Enhancements of Light-Harvesting Processes

Tomasi

Kassal

2020

J. Phys. Chem. Lett.

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“…In this work, we consider a cyanine dye (such as TDBC) [21] mixed with a polymer matrix (poly vinyl alcohol, PVA). The dielectric constants of this excitonic film can be described using the Lorentz model [9,22] (1), we note that the maximum (or the peak value) of Im[ε] ~Δε dye ·A 0 ω 0 /γ 0 .…”

Section: Modeling Of the Dielectric Constants In Excitonic Thin Filmsmentioning

confidence: 99%

Surface bound waves and optical interactions in excitonic thin films

Lee

Woo

Seo

et al. 2018

Opt. Mater. Express

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Excitonic films such as J-aggregate-doped polymer films can exhibit sharp Lorentzian dispersions and thus have various optical features in the visible region. They can even show an optically metallic response and can be considered as alternative plasmonic materials. However, there were no systematic studies on optical interactions in such excitonic films. Here, we perform theoretical investigations on optical modes and interactions in planar excitonic thin films. We gradually vary the dye concentration and the film thickness and study optical coupling to surface bound waves (surface polariton modes and epsilon-near-zero modes). We also investigate thin-film interferences in high-loss and low-loss regimes. Finally, we discuss the freespace impedance matching that can result from the Lorentzian dispersion in excitonic films. Our work enables in-depth understandings on optical interactions in excitonic films and it can provide guidelines for various nanophotonic applications in the visible region.

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“…Such assemblies are called J or Scheibe aggregates after their discoverers, Jelly and Scheibe . The exceptional optical characteristics make J aggregates interesting tools for many applications, ranging from dye‐sensitised silver halide photography, light harvesting, photovoltaics and sensing to biomedical imaging …”

Section: Introductionmentioning

confidence: 99%

Stereochemistry‐Controlled Supramolecular Architectures of New Tetrahydroxy‐Functionalised Amphiphilic Carbocyanine Dyes

Schade

Singh

Wycisk

et al. 2020

Chemistry A European J

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The syntheses of novel amphiphilic5 ,5',6,6'-tetrachlorobenzimidacarbocyanine( TBC) dye derivatives with aminopropanediol head groups, whicho nly differ in stereochemistry (chiral enantiomers, meso form and conformer), are reported. For the achiral meso form, an ew synthetic route towards asymmetric cyanine dyes was established. All compounds form Ja ggregates in water,t he opticalp roperties of which were characterised by means of spectroscopic methods. The supramolecular structure of the aggregates is investigated by means of cryo-transmissione lectron micros-copy,c ryo-electron tomographya nd AFM, revealing extended sheet-like aggregates for chiral enantiomers andn anotubesf or the mesomer,r espectively,w hereast he conformer formsp redominately needle-like crystals. The experiments demonstrate that the aggregation behaviour of compounds can be controlled solelyb yh ead group stereochemistry, whichi nt he case of enantiomerse nables the formation of extended hydrogen-bond chains by the hydroxyl functionalities. In case of the achiral meso form, however,s uch chains turnedo ut to be sterically excluded.

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Fluorescent J-aggregates of cyanine dyes: basic research and applications review

Cited by 304 publications

References 289 publications

Classification of Coherent Enhancements of Light-Harvesting Processes

Classification of Coherent Enhancements of Light-Harvesting Processes

Surface bound waves and optical interactions in excitonic thin films

Stereochemistry‐Controlled Supramolecular Architectures of New Tetrahydroxy‐Functionalised Amphiphilic Carbocyanine Dyes

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