Organic thin‐film transistors based on alkoxynaphthalene end‐capped divinylbenzene

Abstract The new organic semiconductor, which is composed of a divinylbenzene core unit and alkoxynaphthalene on both sides, 1,4‐bis‐2‐(6‐hexyloxy)naphthalen‐2‐yl‐vinylbenzene, was synthesized via Wittig reaction. The obtained oligomer was characterized via FT‐IR, mass and elemental analysis, UV‐visible spectroscopy, cyclovoltammetry, differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). The vacuum‐evaporated film was characterized via X‐ray diffraction and atomic‐force microscopy (AFM). It formed a highly ordered polycrystalline vacuum‐evaporated film and exhibited a good field‐effect performance, with a hole mobility of 0.015cm2/V•s, an on/off ratio of 1.18×105, and a subthreshold slope of 0.69 V when it was deposited at Ts=90°C on HMDS‐treated SiO2.