Photophysics of Pentacene-Doped Picene Thin Films

Tullio Toccoli, Paolo Bettotti, Antonio Cassinese, Stefano Gottardi, Yoshihiro Kubozono, Maria A. Loi, Marianna Manca, Roberto Verucchi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Here, were report a study on picene nanocrystalline thin films doped with pentacene molecules. The thin films were grown by supersonic molecular beam deposition with a doping concentration that ranges between less than one molecule of pentacene for every 104 picene molecules and up to about one molecule of pentacene for every 102 of picene. The morphology and optoelectronic properties of the films were studied as a function of the concentration of dopants. The optical response of the picene films, characterized by absorption, steady-state, and time-resolved photoluminescence measurements, changes dramatically after doping with pentacene. An efficient energy transfer from the picene host matrix to the pentacene guest molecules was observed, giving rise to intense photoluminescence from pentacene. This efficient mechanism opens the possibility to exploit applications where the excitonic states of the guest component, pentacene, are of major interest such as microwave amplification by stimulated emission of radiation. The observed mechanism could also serve as a prototypical system for the study of photophysics of host-guest systems based on different phenacenes and acenes.

Original languageEnglish
Pages (from-to)16879-16886
Number of pages8
JournalJournal of Physical Chemistry C
Volume122
Issue number29
DOIs
Publication statusPublished - Jul 26 2018

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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  • Cite this

    Toccoli, T., Bettotti, P., Cassinese, A., Gottardi, S., Kubozono, Y., Loi, M. A., Manca, M., & Verucchi, R. (2018). Photophysics of Pentacene-Doped Picene Thin Films. Journal of Physical Chemistry C, 122(29), 16879-16886. https://doi.org/10.1021/acs.jpcc.8b02978