In this paper we report polycyclic, fully-conjugated, heteroaromatic compounds 1–5, two of them having a helical shape (tetrathia-[7]-helicenes 1 and 2), and explore their potential use as p-type semiconductors for organic thin-film transistors (OTFTs). Furthermore, we describe their optical absorption, emission, and electrochemical properties. In addition, the single crystal X-ray diffraction structure for compound 3 is reported. Thin films of all compounds were fabricated on several substrates at different temperatures by physical vapor deposition, and were characterized by optical spectroscopy, wide-angle X-ray diffraction, atomic force microscopy, and TFT measurements. The AFM images of compound 1 exhibit an interesting tubular morphology for films deposited at room temperature. This is the first observation of a compound with a helical shape leading to a nanowire-like morphology. In agreement with the molecular structure/morphology, only compound 4 is a ptype semiconductor with good carrier mobility.

Synthesis, characterization, and transistor response of tetrathia-[7]-helicene precursors and derivatives / Kim, Choongik; MARKS TOBIN, J; Facchetti, Antonio; Schiavo, Michele; Bossi, Alberto; Maiorana, Stefano; Licandro, Emanuela; Todescato, Francesco; Toffanin, Stefano; Muccini, Michele; Graiff, Claudia; Tiripicchio, Antonio. - In: ORGANIC ELECTRONICS. - ISSN 1566-1199. - 10:(2009), pp. 1511-1520. [10.1016/j.orgel.2009.08.018]

Synthesis, characterization, and transistor response of tetrathia-[7]-helicene precursors and derivatives

GRAIFF, Claudia;TIRIPICCHIO, Antonio
2009-01-01

Abstract

In this paper we report polycyclic, fully-conjugated, heteroaromatic compounds 1–5, two of them having a helical shape (tetrathia-[7]-helicenes 1 and 2), and explore their potential use as p-type semiconductors for organic thin-film transistors (OTFTs). Furthermore, we describe their optical absorption, emission, and electrochemical properties. In addition, the single crystal X-ray diffraction structure for compound 3 is reported. Thin films of all compounds were fabricated on several substrates at different temperatures by physical vapor deposition, and were characterized by optical spectroscopy, wide-angle X-ray diffraction, atomic force microscopy, and TFT measurements. The AFM images of compound 1 exhibit an interesting tubular morphology for films deposited at room temperature. This is the first observation of a compound with a helical shape leading to a nanowire-like morphology. In agreement with the molecular structure/morphology, only compound 4 is a ptype semiconductor with good carrier mobility.
2009
Synthesis, characterization, and transistor response of tetrathia-[7]-helicene precursors and derivatives / Kim, Choongik; MARKS TOBIN, J; Facchetti, Antonio; Schiavo, Michele; Bossi, Alberto; Maiorana, Stefano; Licandro, Emanuela; Todescato, Francesco; Toffanin, Stefano; Muccini, Michele; Graiff, Claudia; Tiripicchio, Antonio. - In: ORGANIC ELECTRONICS. - ISSN 1566-1199. - 10:(2009), pp. 1511-1520. [10.1016/j.orgel.2009.08.018]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2293613
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