Acid vapor doping of polar polythiophenes for high electrical conductivity.

ABSTRACT: An ideal doping process should be highly efficient and avoid the disruption of molecular packing to achieve the synergistic optimization of carrier concentration and mobility. Herein, we synthesized two polythiophene derivatives with oligo ethylene glycol as side chains and thienothiophene (bithiophene) as unit, denoted Pg₃2T-TT (Pg₃2T-2T). A strong acid, trifluoromethanesulfonic acid (TfOH), was used as dopant to elucidate the effects of two doping methods, solution- and vapor-doping without ultrahigh vacuum, on the polar polythiophenes' electrical properties. Notably, the σ of vapor-doped films were two times higher than those of solution-doped counterparts. Specifically, TfOH vapor-doped Pg₃2T-TT achieved a remarkable σ value of up to 1173.

SUBMITTER: Qiu Y 

PROVIDER: S-EPMC12284755 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature