Funct. Mater. 2018; 25 (4): 684-688.
Peculiarities of excitonic energy transfer at the distance variation between J-aggregates and exciton traps
Institute for Scintillation Materials, STC Institute for Single Crystals, National Academy of Sciences of Ukraine, 60 Nauky Ave., 61072 Kharkiv, Ukraine
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.
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