Phonon-assisted anti-Stokes luminescence of tricarbocyanine near-infrared dye

Dimitriev, Oleg P.; Fedoryak, Alexander; Slominskii, Yu. L.; Smirnova, A. L.; Yoshida, Tsukasa

doi:10.1016/j.cplett.2019.136905

Cited by 15 publications

(19 citation statements)

References 34 publications

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“…Interestingly, the GSB feature demonstrated relatively slow vibronic relaxation processes, that is, about 20–50 ps, before recombination started (Figure S2a, Supporting Information). Such a relaxation is probably due to the torsional motion of the bulky benzo[ e ]indolium groups of 1859, which is attributed to the transformation of the trans‐ to cis ‐ form in the excited single state of tricarbocyanine dyes . This assumption is consistent with the shift of the maximum emission with respect to the excitation, which demonstrates the rise time of 100–200 ps (Figure S3, Supporting Information).…”

Section: Resultssupporting

confidence: 70%

“…Such a relaxation is probably due to the torsional motion of the bulky benzo[e]indolium groups of 1859, which is attributed to the transformation of the trans-to cis-form in the excited single Small 2020, 16,1906745 state of tricarbocyanine dyes. [25,35] This assumption is consistent with the shift of the maximum emission with respect to the excitation, which demonstrates the rise time of 100-200 ps ( Figure S3, Supporting Information). Notably, the rise time of 100-200 ps is overestimated here due to the poor resolution of the time-resolved photoluminescence measurements.…”

Section: Time-resolved Spectroscopysupporting

confidence: 78%

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Reversible Charge Transfer with Single‐Walled Carbon Nanotubes Upon Harvesting the Low Energy Part of the Solar Spectrum

Menon

Slominskii

Joseph

et al. 2020

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Here, the ability of a novel near‐infrared dye to noncovalently self‐assemble onto the surface of single‐walled carbon nanotubes (SWCNTs) driven by charge‐transfer interactions is demonstrated. Steady‐state, Raman, and transient absorption spectroscopies corroborate the electron donating character of the near‐infrared dye when combined with SWCNTs, in the form of fluorescence quenching of the excited state of the dye, n‐doping of SWCNTs, and reversible charge transfer, respectively. Formation of the one‐electron oxidized dye as a result of interactions with SWCNTs is supported by spectroelectrochemical measurements. The ultrafast electronic process in the near‐infrared dye, once immobilized onto SWCNTs, starts with the formation of excited states, which decay to the ground state via the intermediate population of a fully charge‐separated state, with characteristic time constants for the charge separation of 1.5 ps and charge recombination of 25 ps, as derived from the multiwavelength global analysis. Of great relevance is the fact that charge‐transfer occurs from the hot excited state of the near‐infrared dye to SWCNTs.

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Section: Resultssupporting

confidence: 70%

Section: Time-resolved Spectroscopysupporting

confidence: 78%

Reversible Charge Transfer with Single‐Walled Carbon Nanotubes Upon Harvesting the Low Energy Part of the Solar Spectrum

Menon

Slominskii

Joseph

et al. 2020

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“…The latter is due to J-aggregates. 22 Finally, the dye-1859 spectrum in a CaCl 2 composite film reveals an overall broadened absorption, which includes the fingerprints of both H-and Jaggregates in the 550−750 and the 900−1100 nm regions, respectively (Figure 1b, red curve). Importantly, unresolved absorptions between 550 and 750 nm imply, however, the formation of H-type aggregates of different sizes.…”

Section: Introductionmentioning

confidence: 96%

Exciton Dynamics in J- and H-Aggregates of a Tricarbocyanine Near-Infrared Dye

et al. 2021

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Intermolecular interactions in J- and H-aggregates of π-conjugated molecules provide fascinating incentives for excitonic pathways. Investigation regarding exciton dynamics in aggregates of tricarbocyanine near-infrared dyes by transient absorption spectroscopy revealed unusual intermolecular communications not only within different aggregates but also between different aggregates. To this end, aggregation was accompanied by a short-lived excitonic component, that is, on the picosecond time scale, due to additional relaxation channels and a long-lived component, that is, on the nanosecond to microsecond time scales. All of the aforementioned are in sharp contrast to what was found for the monomer. For the monomer, monoexponential exciton dynamics of about 0.5 ns was registered. Overall, the long-lived component in aggregates accounts for 1–5% of all excitons. In J-aggregates, it involves the formation of charge transfer/polaron states. In mixtures of J- and H-aggregates, contributions from the long-lived component further increased. We conclude that interactions between J- and H-aggregates open additional channels for exciton relaxation. One of them is a photoinduced charge transfer from, for example, the bright state in J-aggregates to the dark exciton states in H-aggregates, from where electrons are transferred into the continuum of states.

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“…10. Stokes (lower spectrum) and anti-Stokes (upper spectrum) PL emission of solutions of dye 1859SL [74]. As shown, ASPL phenomenon is more distinct upon heating, which allows one to populate vibronic levels of the ground state.…”

Section: Discussionmentioning

confidence: 84%

Harvesting of the infrared energy: Direct collection, up-conversion, and storage

Dimitriev¹

2019

Semicond. phys. quantum electr. optoelectron

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Infrared (IR) energy constitutes almost a half of the solar radiation coming to the Earth surface and almost 100% of the outgoing terrestrial radiation. Surprisingly, but such a huge energy flux is mostly considered as thermal waste and is not used for the practical needs on the large scale. Here, two major methods of the IR energy collection have been briefly reviewed, the direct one and harvesting through up-conversion to the visible range, where this energy can be picked up by the conventional solar cells. Advantages and disadvantages of the above methods have been discussed. Potential of application of IR dyes for IR energy collection has been demonstrated. Storage of the IR energy as a delayed way of its consumption has been also discussed.

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Phonon-assisted anti-Stokes luminescence of tricarbocyanine near-infrared dye

Cited by 15 publications

References 34 publications

Reversible Charge Transfer with Single‐Walled Carbon Nanotubes Upon Harvesting the Low Energy Part of the Solar Spectrum

Reversible Charge Transfer with Single‐Walled Carbon Nanotubes Upon Harvesting the Low Energy Part of the Solar Spectrum

Exciton Dynamics in J- and H-Aggregates of a Tricarbocyanine Near-Infrared Dye

Harvesting of the infrared energy: Direct collection, up-conversion, and storage

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