Peculiarities of excitonic energy transfer at the distance variation between J-aggregates and exciton traps

• Published in: Functional Materials
• Date: 2018
• Main Authors: Sorokin, A.V., Ropakova, I.Yu., Borovoy, I.A., Yefimova, S.L., Malyukin, Yu.V.
• Format: Article
• Language: English
• Published: НТК «Інститут монокристалів» НАН України 2018
• Subjects: Characterization and properties
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/157426
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Peculiarities of excitonic energy transfer at the distance variation between J-aggregates and exciton traps / A.V. Sorokin, I.Yu. Ropakova, I.A. Borovoy, S.L. Yefimova, Yu.V. Malyukin // Functional Materials. — 2018. — Т. 25, № 4. — С. 684-688. — Бібліогр.: 28 назв. — англ.

Molecular aggregates called J-aggregates are excitonic systems which could be used as optical antennas. Preliminary experiments demonstrated an effective resonance energy transfer from J-aggregates to other dyes playing role of exciton traps by Forster mechanism. In the present study we report unexpected behavior of the distance dependence of the energy transfer in J-aggregate-exciton trap system. Contrary to typical Forster energy transfer dependence as ~ d⁻⁶, the trap sensitized luminescence reveals nonmonotonic dependence with a maximum at ~ 10 nm distance between the J-aggregates and the exciton traps.