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Funct. Mater. 2018; 25 (4): 684-688.

doi:https://doi.org/10.15407/fm25.04.684

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

Institute for Scintillation Materials, STC Institute for Single Crystals, National Academy of Sciences of Ukraine, 60 Nauky Ave., 61072 Kharkiv, Ukraine

Abstract: 

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.

Keywords: 
j-aggregates, exciton, energy transfer, exciton trap, luminescence.
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