| 학회 |
한국공업화학회 |
| 학술대회 |
2015년 봄 (04/29 ~ 05/01, BEXCO (부산)) |
| 권호 |
19권 1호 |
| 발표분야 |
고분자_포스터 |
| 제목 |
Comparative Studies on the Relations between Composition Ratio and Charge Transport of Diketopyrrolopyrrole-Based Random Copolymers |
| 초록 |
Random copolymerization strategy is introduced to increase the solubility of donor−acceptor copolymers so that they can be processed with environmentally benign, halogen-free solvents. Traditionally, it has been believed that the random copolymer with a lower crystalline order should have a significantly lower charge carrier mobility. This report shows that random copolymerization between two highly planar, charge-delocalized repeating units can significantly enhance the solubility while almost preserving the high charge carrier mobility. A comparative study was conducted for a series of random copolymers consisting of diketopyrrolopyrrole−thienothiophene (DPP-TT) and DPP−selenophene− vinylene−selenophene (DPP-SVS) with composition ratios of 10:0, 9:1, 7:3, 5:5, 3:7, 1:9, and 0:10 by using the crystalline order determined from grazing-incident X-ray diffraction measurements and charge carrier mobility determined from field effect transistor measurements. The results showed that the copolymer tends to have a lower degree of intermolecular ordering as the DPP-TT:DPP-SVS composition ratio approaches 5:5 because of the increased segmental randomness in the polymer chain. Nevertheless, the FET mobility did not follow the tendency of crystalline order; instead, it simply followed the order of increasing content of DPP-SVS in the copolymer. This result implies that we can use the random copolymerization strategy to increase the solubility of donor−acceptor copolymers if the two constituent repeating units are structurally planar and the electrons are fully delocalized. |
| 저자 |
성민재1, 윤희준1, 박광훈1, 김란1, 조장환2, 정대성2, 김윤희1
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| 소속 |
1경상대, 2중앙대 |
| 키워드 |
Conjugated polymer; OTFT; Transistor; Random copolymers
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| E-Mail |
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