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Synthesis of Novel Conjugated Polyelectrolytes for Organic Field‐Effect Transistors Gate Dielectric Materials
Author(s) -
Sun Mingliang,
Lan Linfeng,
Wang Li,
Peng Junbiao,
Cao Yong
Publication year - 2008
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.200800420
Subject(s) - polyelectrolyte , conjugated system , polymer chemistry , materials science , condensation polymer , copolymer , dielectric , gate dielectric , field effect transistor , suzuki reaction , polymer , transistor , chemical engineering , chemistry , organic chemistry , alkyl , optoelectronics , aryl , voltage , quantum mechanics , composite material , physics , engineering
Conjugated polyelectrolytes and their neutral precursors: aminoalkyl‐substituted polyfluorenes (PFNs) with different 4,7‐bis( N ‐methylpyrrol‐2‐yl)‐2,1,3‐benzothiadiazole (PBT) contents were synthesized by Suzuki coupling reaction. Their quaternized ammonium polyelectrolyte derivatives were obtained through a post‐polycondensation treatment on the terminal amino groups. The resulting copolymers PFNBr–PBT are soluble in polar solvents such as methanol, DMF, and DMSO. Using the conjugated polyelectrolytes PFNBr–PBT5 as gate dielectric material, poly(3‐hexylthiophene) (P3HT) ‐based field‐effect transistors (FETs) show a high drain current of almost 4.5 mA within a gate voltage of only −3 V. The calculated hole mobility of P3HT is about 0.58 cm 2 · V −1 · s −1 .