TY - JOUR
T1 - Distributed decay kinetics of charge separated state in solid film
AU - Lehtivuori, Heli
AU - Efimov, Alexander
AU - Lemmetyinen, Helge
AU - Tkachenko, Nikolai V.
PY - 2007/4/2
Y1 - 2007/4/2
N2 - Photoinduced electron transfer in solid films of porphyrin-fullerene dyads was studied using femtosecond pump-probe method. The relaxation of the main photo-product, intramolecular exciplex, was found to be essentially non-exponential. To analyze the decays a model accounting for a distribution of the free or reorganization energies is proposed. The model allows to fit the experimental data using three parameters: non-disturbed time constant, τ0, width of the energy distribution, ΔE, and sensitivity parameter, a = -(Δ G0 + λ0)/2λ0, where ΔG0 and λ0 are the average free and reorganization energies, respectively. The parameters were found to be τ0 = 50 ps, ΔE = 0.09 eV and a = 2 for the exciplex relaxation.
AB - Photoinduced electron transfer in solid films of porphyrin-fullerene dyads was studied using femtosecond pump-probe method. The relaxation of the main photo-product, intramolecular exciplex, was found to be essentially non-exponential. To analyze the decays a model accounting for a distribution of the free or reorganization energies is proposed. The model allows to fit the experimental data using three parameters: non-disturbed time constant, τ0, width of the energy distribution, ΔE, and sensitivity parameter, a = -(Δ G0 + λ0)/2λ0, where ΔG0 and λ0 are the average free and reorganization energies, respectively. The parameters were found to be τ0 = 50 ps, ΔE = 0.09 eV and a = 2 for the exciplex relaxation.
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U2 - 10.1016/j.cplett.2007.02.029
DO - 10.1016/j.cplett.2007.02.029
M3 - Article
AN - SCOPUS:33947249572
SN - 0009-2614
VL - 437
SP - 238
EP - 242
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 4-6
ER -