Graaf, H.H.GraafFriedriszik, F.F.FriedriszikWagner, Christian FriedemannChristian FriedemannWagnerBorczyskowski, C. vonC. vonBorczyskowski2022-03-042022-03-042011https://publica.fraunhofer.de/handle/publica/22765110.1021/jp1121323Emission spectra of amorphous thin films of chlorinated N,N-dimethyl-perylene-tetra-carboxylic-acid-diimide (Cl4MePTCDI) are characterized by two features: A small monomer emission and a further dominating and broad red-shifted peak. Temperature-dependent fluorescence and lifetime studies of the different excited states were carried out and led to the conclusion that the new state responsible for the red-shifted emission is populated via the excited monomeric state and vice versa. This new state can be understood as a trap caused by irregularities of the material, which can influence, for example, the twisting of the perylene core and therefore the energetics of the molecule.enjournal article