title: Unlocking the functional properties in one-dimensional MoSI cluster polymers by doping and photoinduced charge transfer.
abstract: To improve functionalization of MoSI cluster polymers we have studied the effects of adsorption doping on the electrical transport, bundling, and optical absorption spectra. Doping results both in enhanced conductivity and aggregated bundles in dispersion. The different electronic properties of different bundle diameters can be ascribed to self-doping during the synthesis. Furthermore, doping shifts the characteristic absorption peaks and transfers oscillator strength to lower energies. Femtosecond optical spectroscopy shows that the spectral signature of adsorption and self-doping indeed originates from the population of electronic levels that are empty or absent in the undoped sample. The large spectral shifts and long lifetimes of photoinduced charges suggest efficient localization.
authors.affiliation: Department of Complex Matter, Jožef Stefan Institute , Jamova 39, 1000 Ljubljana, Slovenia.
authors.forename: Peter
authors.initials: P
authors.lastname: Topolovsek
authors.forename: Christoph
authors.initials: C
authors.lastname: Gadermaier
authors.forename: Damjan
authors.initials: D
authors.lastname: Vengust
authors.forename: Martin
authors.initials: M
authors.lastname: Strojnik
authors.forename: Jure
authors.initials: J
authors.lastname: Strle
authors.forename: Dragan
authors.initials: D
authors.lastname: Mihailovic
keywords: Adsorption doping; femtosecond spectroscopy; molybdenum chalcohalides; optical spectroscopy; semiconducting nanowires