Bis(triisopropylsilylethynyl)pentacene/Au(111) interface: Coupling, molecular orientation, and thermal stability (Articolo in rivista)

Type
Label
  • Bis(triisopropylsilylethynyl)pentacene/Au(111) interface: Coupling, molecular orientation, and thermal stability (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/jp504401v (literal)
Alternative label
  • Gnoli A.; Ustunel H.; Toffoli D.; Yu L.; Catone D.; Turchini S.; Lizzit S.; Stingelin N.; Larciprete R. (2014)
    Bis(triisopropylsilylethynyl)pentacene/Au(111) interface: Coupling, molecular orientation, and thermal stability
    in Journal of physical chemistry. C. (Online)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Gnoli A.; Ustunel H.; Toffoli D.; Yu L.; Catone D.; Turchini S.; Lizzit S.; Stingelin N.; Larciprete R. (literal)
Pagina inizio
  • 22522 (literal)
Pagina fine
  • 22532 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.scopus.com/inward/record.url?eid=2-s2.0-84907766807&partnerID=q2rCbXpz (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 118 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 39 (literal)
Note
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR-ISC Istituto Dei Sistemi Complessi, Via Fosso del Cavaliere 100, Rome, 00133, Italy; Department of Physics, Middle East Technical University, Ankara, 06531, Turkey; Department of Chemistry, Middle East Technical University, Ankara, 06531, Turkey; King Abdullah University of Science and Technology, 3326-WS06, Al Kindi Building 4600 KAUST, Thuwal, 23955-6900, Saudi Arabia; CNR-ISM Istituto di Struttura della Materia, Via Fosso del Cavaliere 100, Rome, 00133, Italy; Elettra-Sincrotrone Trieste S.C.p.A., AREA Science Park, S.S. 14 km 163.5, Trieste, 34149, Italy; Department of Materials, Imperial College London, London, SW7 2AZ, United Kingdom (literal)
Titolo
  • Bis(triisopropylsilylethynyl)pentacene/Au(111) interface: Coupling, molecular orientation, and thermal stability (literal)
Abstract
  • The assembly and the orientation of functionalized pentacene at the interface with inorganics strongly influence both the electric contact and the charge transport in organic electronic devices. In this study electronic spectroscopies and theoretical modeling are combined to investigate the properties of the bis(triisopropylsilylethynyl)pentacene (TIPS-Pc)/Au(111) interface as a function of the molecular coverage to compare the molecular state in the gas phase and in the adsorbed phase and to determine the thermal stability of TIPS-Pc in contact with gold. Our results show that in the free molecule only the acene atoms directly bonded to the ligands are affected by the functionalization. Adsorption on Au(111) leads to a weak coupling which causes only modest binding energy shifts in the TIPS-Pc and substrate core level spectra. In the first monolayer the acene plane form an angle of 33 ± 2° with the Au(111) surface at variance with the vertical geometry reported for thicker solution-processed or evaporated films, whereas the presence of configurational disorder was observed in the multilayer. The thermal annealing of the TIPS-Pc/Au(111) interface reveals the ligand desorption at ~470 K, which leaves the backbone of the decomposed molecule flat-lying on the metal surface as in the case of the unmodified pentacene. The weak interaction with the metal substrate causes the molecular dissociation to occur 60 K below the thermal decomposition taking place in thick drop-cast films. (literal)
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