6533b870fe1ef96bd12cf35f

RESEARCH PRODUCT

SURFACE EFFECTS ON THE GROWTH OF SOLUTION PROCESSED PENTACENE THIN FILMS

Sebastiano RavesiCorrado BongiornoChiara MusumeciClaudia CascioGiuseppe Francesco IndelliAntonino ScandurraBruno Pignataro

subject

Electron mobilitySpin coatingMaterials scienceIntermolecular forcecrystal growthpentacene precursorsolution depositionCrystal growthSurfaces and Interfacesspin-coatingCondensed Matter PhysicsLangmuir–Blodgett filmSurfaces Coatings and FilmsPentacenechemistry.chemical_compoundLangmuir-BlodgettchemistryChemical physicsPhase (matter)Materials ChemistryOrganic chemistryThin filmthin films pentacene electronic devices interfaces

description

13,6-N-Sulfinylacetamidopentacene (SAP) has been transferred on solid substrates both by water-rich environment and organic solvents without altering his chemical structure. Thermal conversion of SAP to pentacene leads to crystals showing similar features of vacuum-sublimated pentacene both in the bulk and thin-film phases. The thin-film phase is strongly affected by the substrate surface properties. Low energy Si-CH3 rich surfaces allow for the formation of compact micrometric crystals following a Volmer-Weber like growth with orientation suitable for field-effect carrier mobility. Screw dislocations along with straight edges are found on these systems as an indication of a loose interlayer interaction with respect to the lateral pi-pi intermolecular forces. In contrast, higher energy SiOH rich surfaces result in non-compact systems (Stransky-Krastanov like growth) arising by in-space randomly oriented crystals as well as by individual screw dislocations. (C) 2007 Elsevier B.V. All rights reserved.

yearjournalcountryeditionlanguage
2008-02-01
10.1016/j.susc.2007.12.029http://hdl.handle.net/10447/49713