Theoretical analysis of the relaxation dynamics in perylene bisimide dimers excited by femtosecond laser pulses.
Theoretical analysis of the relaxation dynamics in perylene bisimide dimers excited by femtosecond laser pulses.
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飞秒激光脉冲激发苝双酰亚胺二聚体弛豫动力学的理论分析
DOI:
10.1021/jp412166a
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
V. Engel
中科院分区:
文献类型:
--
作者:
A. Schubert;M. Falge;M. Kess;V. Settels;S. Lochbrunner;W. T. Strunz;F. Würthner;B. Engels;V. Engel
We present a model for the relaxation dynamics in perylene bisimide dimers, which is based on ab initio electronic structure and quantum dynamics calculations including effects of dissipation. The excited-state dynamics proceeds via a mixing of electronic states of local Frenkel and charge-transfer characters, which becomes effective upon a small distortion of the dimer geometry. In this way, it is possible to explain the fast depopulation of the photoexcited state, which we characterize by femtosecond transient absorption measurements. The combined theoretical and experimental analysis hints at a trapping mechanism, which involves nonadiabatic and dissipative dynamics in an excited-state vibronic manifold and provides an atomistic picture that might prove valuable for future design of photovoltaic materials.
DOI:
10.1063/1.3526749
发表时间:
2010
期刊:
The Journal of chemical physics
影响因子:
--
作者:
Jan J J Roden;A. Eisfeld;M. Dvořák;O. Bünermann;F. Stienkemeier
通讯作者:
F. Stienkemeier
影响因子:
4.4
作者:
Hättig, C;Köhn, A
通讯作者:
Köhn, A
影响因子:
3.3
作者:
M. Schlesinger;W.T. Strunz
通讯作者:
W.T. Strunz