Evidence for phase formation in potassium intercalated 1,2;8,9-dibenzopentacene

TL;DR

This study demonstrates the formation of specific potassium-doped phases in 1,2;8,9-dibenzopentacene films through electron energy-loss spectroscopy, revealing their stability and electronic ground states.

Contribution

It provides experimental evidence for phase formation and stability of potassium intercalated dibenzopentacene, advancing understanding of its electronic properties.

Findings

Identification of doped phases Kx-dibenzopentacene (x=1,2,3)

Analysis of phase stability with temperature

Insights into the electronic ground state

Abstract

We have prepared potassium intercalated 1,2;8,9-dibenzopentacene films under vacuum conditions. The evolution of the electronic excitation spectra upon potassium addition as measured using electron energy-loss spectroscopy clearly indicate the formation of particular doped phases with compositions K$_x$dibenzopentacene ($x$ = 1,2,3). Moreover, the stability of these phases as a function of temperature has been explored. Finally, the electronic excitation spectra also give insight into the electronic ground state of the potassium doped 1,2;8,9-dibenzopentacene films.