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6 February 2020 Electron-hole processes determining the self-desensitization of dyes on the surface of AgHal microcrystals
A. V. Tyurin, A. Ya. Bekshaev, S. A. Zhukov
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Proceedings Volume 11369, Fourteenth International Conference on Correlation Optics; 113690L (2020) https://doi.org/10.1117/12.2556080
Event: Fourteenth International Conference on Correlation Optics, 2019, Chernivtsi, Ukraine
Abstract
In the study of low-temperature (T = 77 K) luminescence of anionic, cationic and neutral-typel dyes adsorbed on the surface of AgHal microcrystals in molecular, H- and J-aggregated states, electron-hole processes are revealed that are responsible for the anti-Stokes anomalously slowed-down fluorescence and phosphorescence of the molecular dye upon its j-aggregate excitation. Based on the results obtained, a luminescent technique is proposed that enables to control the interactions processes between molecular and polymolecular forms of dyes of the three charge states. These processes are responsible for the "self-desensitization", and ways to reduce the negative impact of the "self-desensitization" effects are considered.
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A. V. Tyurin, A. Ya. Bekshaev, and S. A. Zhukov "Electron-hole processes determining the self-desensitization of dyes on the surface of AgHal microcrystals", Proc. SPIE 11369, Fourteenth International Conference on Correlation Optics, 113690L (6 February 2020); https://doi.org/10.1117/12.2556080
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KEYWORDS
Luminescence
Absorption
Absorption
Silver
Silver
Phosphorescence
Phosphorescence
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