Synthesis and Electrical Characterization of Poly[(linoleic acid) <i>‐g‐</i> (styrene) <i>‐g‐</i> (ε‐caprolactone)] Graft Copolymers as Gate Insulator for <scp>OFET</scp> Devices

This study reported a one-pot process used to synthesize poly[(linoleic acid)-g-(styrene)-g-(ε-caprolactone)] (PLina-g-PSt-g-PCL) graft copolymers. The was carried out by combining the atom transfer radical polymerization (ATRP) of styrene with ring-opening (ROP) ε-caprolactone from polymeric linoleic acid having hydroxyl groups and bromine (PLina-Br) in main chain. characterization products achieved using proton nuclear magnetic resonance (1HNMR), size-exclusion chromatography (SEC), Fourier-transform infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC) techniques. Subsequently, an organic field effect transistor (OFET) fabricated PLina-g-PSt-g-PCL) copolymers as insulator layer. Poly(3-hexylthiophene) (P3HT) active layer pre-patterned OFET substrates were welding/discharge electrodes. To measure capacitance, ITO/P3HT/PLina-g-PSt-g-PCL/Al structure prepared same method. obtain output current-voltage (I-V) characteristics, electrical characterizations devices conducted darkness atmosphere air. From capacitance-frequency (C-f) plot, key characteristics devices, including threshold voltage (VTh), mobility (μFET), current on/off ratio (Ion/off), derived. fundamental parameters based on concentration thoroughly examined. It observed that produced PLina-g-PSt-g-PCL OFETs display positive device such low VTh, exceptional mobility, Ion/off values. article is protected copyright. All rights reserved.