| dc.description.abstract | Two newly developed thiophene-based ionic polymer, P3ST-T1 (5) and P3ST-T2 (6), were prepared for lithium-ion battery (LIBs). Thioalkylated bithiophene (SBT) and 3-alkylated thiophenes bearing ionic group were used as the monomers for polymerization.
A regiospecific 3-thioalkylated bithiophene-based polymer, P3ST (4) (head, head), was prepared for OTFTs; where the SBT units were used as monomers for Stille polymerization.
In our previous studies, fuse-thiophene-based quinoidals with different alkyl chains, DTTRQ-6 and DTTRQ-11 exhibit good n-channel mobility of 0.27 and 0.45 cm2/Vs, repectively, via solution shearing. Herein, two new quinoidals DTTRQ-3 (2), DTTRQ-15 (3) were synthesized and characterized for comparison. All these new quinoidals exhibit fairly low LUMO (< -4.1 eV) and thus are potentially air stable n-type materials. DTTRQs also exhibit high and average mobilities in ambipolar OTFTs. For example, DTTRQ-11 (N-type) / DDTT-BST (P-type) blend exhibits hole and electron mobilities greater than 0.1 cm2/Vs.
The optical and electrochemical properties (HOMO and LUMO) of these materials were characterized by UV-vis and DPV. Thermal properties were investigated by TGA. Currently, these new developed semiconductors in OTFT device studies are still in progress. | en_US |