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Quantum efficiency of energy transfer in noncovalent carbon nanotube/porphyrin compounds

Published on - Applied Physics Letters

Authors: Cyrielle Roquelet, Damien Garrot, Jean‐sébastien Lauret, C. Voisin, Valérie Alain-Rizzo, Philippe Roussignol, Jacques A. Delaire, Emmanuelle Deleporte

We report on the quantum yield of excitation energy transfer in non-covalently bound nan- otube/porphyrin compounds. Evidence for energy transfer is gained from photoluminescence exci- tation experiments. We perform a quantitative evaluation of the transfer quantum yield in the case of (6,5) nanotubes through three independent methods : quantitative PLE measurements, evalu- ation of the luminescence quenching of the donor (porphyrin) and ultrafast transient absorption measurements. The latter shows a tremendous increase of the porphyrin recovery rate upon incor- poration in the compound. All these measurements consistently lead to an exceptional quantum yield efficiency.