Distributed decay kinetics of charge separated state in solid film

Heli Lehtivuori; Alexander Efimov; Helge Lemmetyinen; Nikolai V. Tkachenko

doi:10.1016/j.cplett.2007.02.029

Distributed decay kinetics of charge separated state in solid film

Heli Lehtivuori
, Alexander Efimov
, Helge Lemmetyinen
, Nikolai V. Tkachenko^*

^*Corresponding author for this work

Biophysics Photosynthesis/Energy

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

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.

Original language	English
Pages (from-to)	238-242
Number of pages	5
Journal	Chemical Physics Letters
Volume	437
Issue number	4-6
DOIs	https://doi.org/10.1016/j.cplett.2007.02.029
Publication status	Published - 2 Apr 2007

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10.1016/j.cplett.2007.02.029

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title = "Distributed decay kinetics of charge separated state in solid film",

abstract = "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.",

author = "Heli Lehtivuori and Alexander Efimov and Helge Lemmetyinen and Tkachenko, \{Nikolai V.\}",

year = "2007",

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doi = "10.1016/j.cplett.2007.02.029",

language = "English",

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pages = "238--242",

journal = "Chemical Physics Letters",

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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

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VL - 437

SP - 238

EP - 242

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 4-6

ER -

Distributed decay kinetics of charge separated state in solid film

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