Development of Solution Processable Thioalkylated and Selenalkylated Thiophenes for Small Molecular Organic Thin Film Transistors

• Main Authors: Chang-Hui Cho, 卓長輝
• Other Authors: Ming-Chou Chen
• Format: Others
• Language: en_US
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/gbp646

碩士 === 國立中央大學 === 化學學系 === 106 === New small molecules based on TSBT, DSDTT, and SeBT cores have been synthesized for organic thin film transistors (OTFTs). For the first TSBT series, n-type TSBTQ-14 (TSBTQ with C14H29 chains) and TSBTQ-6 (TSBTQ with C6H13 chains) exhibited mobility of 0.14 cm2V-1s-1 and 0.10 cm2V-1s-1. To further complete the side chains effect study, TSBTQ-10 (1; TSBTQ with C10H21 chains) was synthesized and characterized. Via solution shearing, TSBT-10 exhibits the best mobility up to 0.18 cm2V-1s-1 in this series. For the second DSDTT series, DDTT-DSDTT-10 (DSDTT with C10H21 chains) exhibited high mobility 2.6 cm2V-1s-1. To further complete the side chains effect study, DDTT-DSDTT-8 (2; with C8H17 chains) was synthesized and characterized. Via solution shearing, DDTT-DSDTT-8 demonstrates the best mobility up to 3.2 cm2V-1s-1. Both molecular structures of DSDTTs were determined by single crystal X-ray diffraction and exhibits two parallel face-to-face columnar stacking’s with a very close interplanar core distance of 3.6 Å . For the third series, a couple new small molecules based on the selenylated bithiophene (SeBT) with different end-capped aromatic groups and alkyl chains were developed. DDTT-SeBT-14 (7; with C14H29 chains) exhibits the highest mobility of 4.00 cm2V-1s-1 via solution shearing. The molecular structures of DDTT-SeBT-14 and DDTT-SeBT-10 (6) were determined by single crystal X-ray diffraction and showed brick-type iv molecular stacking.