Source:MRS Proceedings, Cambridge Univ Press, Volume 598, p.BB8-2 (1999)
Keywords:1999, 2013 and earlier
Solution spectra of perylenetetracarboxylic dianhydride (PTCDA) show an equilibrium between monomers and dimers, with fluorescence exclusively
from monomers and absorption from both. The dimer absorption follows
closely the spectrum of PTCDA stacks in crystalline films, which indicate
strong coupling to a molecular vibration and mixing of Frenkel and
charge-transfer excitons. The same model accounts for solution spectra.