Momentum dependence of the excitons in pentacene

We have carried out electron energy-loss investigations of the lowest singlet excitons in pentacene at 20 K. Our studies allow to determine the full exciton band structure in the a*, b* reciprocal lattice plane. The lowest singlet exciton can move coherently within this plane, and the resulting exciton dispersion is highly anisotropic. The analysis of the energetically following (satellite) features indicates a strong admixture of charge transfer excitations to the exciton wave function. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4723812]


Published in:
Journal Of Chemical Physics, 136, -
Year:
2012
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 Record created 2012-06-29, last modified 2018-03-17


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