本論文主要可以分為有機薄膜電晶體材料 (OTFT) 和導電高分子。OTFT 材料延續實驗室三併環噻吩 DTTRQ 結構，為 N-type 小分子；P-type 高分子以硫醚鏈聯噻吩為單體聚合而成 P3ST (4)。離子導電高分子結合硫醚鏈聯噻吩和離子基團，為 P3ST-T1 (5) 和 P3ST-T2 (6)，期望應用在鋰電池之電極。 實驗室先前開發的 DTTRQ-6 與 DTTRQ-11，N-type電性表現分別為 0.27 和 0.45 cm2/Vs，此系列還具備 Ambipolar 的性質，像是 DTTRQ-11 與 DDTT-BST (P-type) 混摻，電性皆達到0.1 cm2/Vs。為了探討碳鏈對 DTTRQ 的影響，引入其它碳鏈於併環噻吩主體，開發出可溶性 N-type 的有機化合物 DTTRQ-3 (2) 與 DTTRQ-15 (3)，目前載子移動率為 10-2 cm2/Vs。聯噻吩高分子 P3ST 其噻吩骨架帶有硫醚碳鏈且為頭對頭之立體位向，硫之間的作用力會增加分子間的平面性，目前載子移動率達 10-3 cm2/Vs，還可進一步優化。離子導電高分子目前已經聚合成高分子，只需將離子基團修飾於高分子，即可測試其在鋰離子電池的效果。 ;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.
