title: High-performance single crystal organic field-effect transistors based on two dithiophene-tetrathiafulvalene (DT-TTF) polymorphs.
abstract: Solution prepared single crystal organic field-effect transistors (OFETs) combine low-cost with high performance due to structural ordering of molecules. However, in organic crystals polymorphism is a known phenomenon, which can have a crucial influence on charge transport. Here, the performance of solution-prepared single crystal OFETs based on two different polymorphs of dithiophene-tetrathiafulvalene, which were investigated by confocal Raman spectroscopy and X-ray diffraction, are reported. OFET devices prepared using different configurations show that both polymorphs exhibited excellent device performance, although the -phase revealed charge carrier mobility between two and ten times higher in accordance to the closer stacking of the molecules.
authors.affiliation: Institut de Ciencia de Materials de Barcelona, Bellaterra, Spain.
authors.forename: Raphael
authors.initials: R
authors.lastname: Pfattner
authors.forename: Marta
authors.initials: M
authors.lastname: Mas-Torrent
authors.forename: Ivano
authors.initials: I
authors.lastname: Bilotti
authors.forename: Aldo
authors.initials: A
authors.lastname: Brillante
authors.forename: Silvia
authors.initials: S
authors.lastname: Milita
authors.forename: Fabiola
authors.initials: F
authors.lastname: Liscio
authors.forename: Fabio
authors.initials: F
authors.lastname: Biscarini
authors.forename: Tomasz
authors.initials: T
authors.lastname: Marszalek
authors.forename: Jacek
authors.initials: J
authors.lastname: Ulanski
authors.forename: Andrzej
authors.initials: A
authors.lastname: Nosal
authors.forename: Maciej
authors.initials: M
authors.lastname: Gazicki-Lipman
authors.forename: Michael
authors.initials: M
authors.lastname: Leufgen
authors.forename: Georg
authors.initials: G
authors.lastname: Schmidt
authors.forename: Laurens W
authors.initials: LW
authors.lastname: Molenkamp
authors.forename: Vladimir
authors.initials: V
authors.lastname: Laukhin
authors.forename: Jaume
authors.initials: J
authors.lastname: Veciana
authors.forename: Concepció
authors.initials: C
authors.lastname: Rovira
mesh_terms: D003460:Crystallization; D006571:Heterocyclic Compounds / Q000737:chemistry*; D013059:Spectrum Analysis, Raman; D013876:Thiophenes / Q000737:chemistry*; D014173:Transistors, Electronic; D014961:X-Ray Diffraction
chemical_list: D006571:Heterocyclic Compounds; D013876:Thiophenes; C063887:tetrathiafulvalene