Synthesis of donor–acceptor copolymer using benzoselenadiazole as acceptor for OTFT. Issue 5 (7th January 2016)

• Record Type: Journal Article
• Authors: Shaik, Baji; Han, Jin-Hee; Song, Dong Jin; Kang, Hun-Min; Kim, Ye Beyeol; Park, Chan Eon; Lee, Sang-Gyeong
• Is Part Of: RSC advances. Volume 6:Issue 5(2016)
• Page Start: 4070
• Page End: 4076
• Publication Date: 2016-01-07
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra23805f
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The synthesized copolymer has a low band gap and exhibits a hole mobility of around 0.1 cm 2 V −1 s −1 . Abstract : Donor–acceptor-based poly( E )-4-(3, 4′-didodecyl-5′-(2-(3-dodecylthiophen-2-yl)vinyl)-2, 2′-bithiophen-5-yl)-7-(4-dodecylthiophen-2-yl)benzo[ c ][1, 2, 5]selenadiazole (11 ) has been synthesized by a Stille coupling reaction. This polymer has a low energy band gap between the HOMO and LUMO energy levels of 1.75 eV. The polymer exhibited good thermal stability. An OTFT prepared using this polymer displayed high hole mobility of 0.097 cm 2 V −1 s −1 at 200 °C, a high on/off ratio of 7.8 × 10 4, and a low threshold voltage of 11.2 V. When compared with as-cast films, annealed films exhibited higher mobility, which was attributed to an increase in crystallinity with an increase in the annealing temperature.