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Optical signatures of pentacene in soft rare-gas environments

: Stauffert, O.; Izadnia, S.; Stienkemeier, F.; Walter, M.


The Journal of chemical physics 150 (2019), No.24, Art. 244703, 9 pp.
ISSN: 0021-9606
Deutsche Forschungsgemeinschaft DFG
IRTG 2079 CoCo
Journal Article
Fraunhofer IWM ()
acenes; pentacene; PC; organic dye; energy conversion; PTCDA; LIF spectra

Acenes and pentacene (Pc), in particular, are promising candidates for organic dyes with interesting properties important for solar light to energy conversion. We present a combined experimental and computational study of Pc in an ultracold environment that allows for high resolution optical spectroscopy. The spectra and their vibrational substructure are interpreted with the help of density functional theory calculations. While there are only slight changes within superfluid helium as compared to vacuum, the neon surface shows more prominent effects. Additional vibrational coupling by neon modes leads to broadening as well as the emergence of new features, like the otherwise symmetry forbidden out-of-plane butterfly mode.