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Ambipolar Field‐Effect Transistor (FET) and Redox Characteristics of a π ‐Conjugated Thiophene/1,3,4‐Thiadiazole CT‐Type Copolymer
Author(s) -
Yamamoto Takakazu,
Yasuda Takuma,
Sakai Yoshimasa,
Aramaki Shinji
Publication year - 2005
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200500276
Subject(s) - ambipolar diffusion , materials science , thiophene , organic field effect transistor , copolymer , transistor , cyclic voltammetry , field effect transistor , electron mobility , conjugated system , analytical chemistry (journal) , doping , optoelectronics , electrochemistry , polymer chemistry , polymer , electron , chemistry , electrode , voltage , electrical engineering , organic chemistry , physics , composite material , quantum mechanics , engineering
Summary: A π ‐conjugated charge transfer‐type copolymer consisting of an electron‐donating thiophene and an electron‐accepting 1,3,4‐thiadiazole, P(ThdzTh), underwent facile electrochemical p ‐ and n ‐doping, as revealed by cyclic voltammetry. The copolymer gave a new ambipolar field‐effect transistor (FET), which showed typical I DS (source–drain current)– V DS (source–drain voltage) curves in both a p ‐type working mode and an n ‐type working mode. In the n ‐type working mode, the polymer showed a carrier mobility of about 5 × 10 −3 cm 2 · V −1 · s −1 and an on/off ratio of about 3 × 10 4 .n ‐Channel field‐effect transistor characteristics of P(ThdzTh).