Exciton properties of selected aromatic hydrocarbon systems
arXiv:1301.1777 · doi:10.1140/epjb/e2012-30592-1
Abstract
We have examined the singlet excitons in two representatives of acene-type (tetracene and pentacene) and phenacene-type (chrysene and picene) molecular crystals, respectively, using electron energy-loss spectroscopy at low temperatures. We show that the excitation spectra of the two hydrocarbon families significantly differ. Moreover, close inspection of the data indicates that there is an increasing importance of charge-transfer excitons at lowest excitation energy with increasing length of the molecules.
References in corpus (8)
- Quasiparticle and Optical Spectroscopy of Organic Semiconductors Pentacene and PTCDA from First Principles
- Superconductivity at 5 K in potassium doped phenanthrene
- Electronic polarization in pentacene crystals and thin films
- Superconductivity in alkali-earth metals doped phenanthrene
- Momentum dependence of the excitons in pentacene
- Electronic properties of molecular solids: the peculiar case of solid Picene
- Exciton character in picene molecular solids
- Dynamic response and electronic structure of potassium doped picene investigated by electron energy-loss spectroscopy