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

Cyrielle Roquelet (1) , Damien Garrot (1) , Jean‐sébastien Lauret (1) , C. Voisin (2) , Valérie Alain-Rizzo (3) , Philippe Roussignol (2) , Jacques A. Delaire (3) , Emmanuelle Deleporte (1)

1 LPQM - Laboratoire de Photonique Quantique et Moléculaire
2 LPA - Laboratoire Pierre Aigrain
3 PPSM - Laboratoire de Photophysique et Photochimie Supramoléculaires et Macromoléculaires

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.

Domaines: Autre [cond-mat.other]

Cyrielle Roquelet, Damien Garrot, Jean‐sébastien Lauret, C. Voisin, Valérie Alain-Rizzo, et al.. Quantum efficiency of energy transfer in noncovalent carbon nanotube/porphyrin compounds. Applied Physics Letters, 2010, 97 (14), pp.141918. ⟨10.1063/1.3496470⟩. ⟨hal-00528347⟩