Premium
Copolythiophenes with Hydrophilic and Hydrophobic Side Chains: Synthesis, Characterization, and Performance in Organic Field Effect Transistors
Author(s) -
Bilkay Taybet,
Schulze Kerstin,
EgorovBrening Tatjana,
Bohn Andreas,
Janietz Silvia
Publication year - 2012
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201200267
Subject(s) - side chain , polythiophene , materials science , copolymer , crystallinity , polymer chemistry , polymer , organic field effect transistor , transistor , field effect transistor , dielectric , conjugated system , chemical engineering , solubility , conductive polymer , optoelectronics , chemistry , organic chemistry , composite material , physics , quantum mechanics , voltage , engineering
Statistical copolymers of regioregular polythiophene with hydrophobic hexyl side chains (P3HT) and hydrophilic 3,6‐dioxaheptyl side chains (P3DOHT) are synthesized by the GRIM method. A comparable study on the different polymers has been accomplished regarding solubility, thin film structure, and performance in organic field effect transistors (OFETs). DSC and XRD measurements are done to investigate the crystallinity of the copolymers. The novel functionalized fully π‐conjugated copolymers P(3HT‐ co ‐3DOHT) with feed molar ratios of 1:1, 2:1, and 1:2 show hole mobilities in the range of 10 −2 cm 2 V −1 s −1 . Using poly(methyl methacrylate) as the dielectric layer in a top gate device architecture leads to air stable transistors without significant losses in the OFET performance over several months.