Figure 6
From: Liquid crystalline organic semiconductors for organic transistor applications

Optical microscopy textures and field effect transistor (FET) mobilities of polycrystalline thin films of two BTBT derivatives after being subjected to thermal stress at 150 °C. (a) Chemical structures of 10-BTBT-10 having only Smectic A (SmA) and 8-Tp-BTBT having Smectic E (SmE) phases, textures of (b) 8-Tp-BTBT and (c) 10-BTBT-10. (d) FET mobilities of 8-Tp-BTBT and 10-BTBT-10 as a function of stress temperature. White bars indicate 20-μm length.