A star-shaped molecule as hole transporting material in solution-processed thin-film transistors

作者：Diallo Abdou Karim; Metri Noura; Brunel Frederic; Sallenave Xavier; Goubard Fabrice; Margeat Olivier; Ackermann Jorg; Videlot Ackermann Christine^*

来源：Synthetic Metals, 2013, 184: 35-40.

DOI：10.1016/j.synthmet.2013.09.029

• Organic semiconductor
• Triphenylamine
• Spin-coating
• Thin film
• Molecular glasses
• Transistor

The semiconductor potentialities of a new star-shaped molecule consisting of a triphenylamine core carrying pi-conjugated thiophene and thieno[3,2-b]-thiophene-C9H19 units, VM5C9, has been evaluated by its implementation as active layer in organic thin-film transistors (OTFTs). The photophysical properties of VM5C9 were previously studied by UV-vis absorption and emission spectroscopy in both dilute solutions and thin films. The latter were prepared from solutions in toluene, chloroform (CHCl3), dichloromethane (CH2Cl2) and tetrahydrofuran (THF) by spin-coating on substrates following by an annealing to a controlled temperature ranging from 60 C to 90 degrees C. Thin-film morphology and structure were characterized by X-ray diffraction and scanning electron microscopy. Solution processed thin films lead to glassy films. An optimized hole mobility up to 3.8 x 10(-4) cm(2)/Vs could be reached by a fine control of the liquid-phase deposition method, the choice of solvent and post-annealing temperature.

• 出版日期2013-11-15