| 학회 |
한국화학공학회 |
| 학술대회 |
2018년 봄 (04/25 ~ 04/27, 창원컨벤션센터) |
| 권호 |
24권 1호, p.42 |
| 발표분야 |
고분자 |
| 제목 |
Effects of conjugation length on crystalline perfectness and charge transport in diketopyrrolopyrrole-based polymer semiconductors |
| 초록 |
In order to improve the charge carrier mobility of the diketopyrrolopyrrole donor-acceptor copolymer semiconductors, the length of the donor building block is controlled using vinylene moieties and its effect on crystal structure and charge transport is systematically studied. We synthesize P29-DPP-TBT with two vinylene linkages between thiophene units and compare it with P29-DPP-TVT with single vinylene linkage. In a two-dimensional grazing incidence X-ray diffraction study, it was found that paracrystalline disorder was lower in P29-DPP-TBT than in P29-DPP-TBT. By measuring the temperature dependence of charge carrier mobility, it has been found that the activation energy for charge transfer hopping to P29-DPP-TBT is lower than that of P29-DPP-TBT. Taken together, these results imply that the substitution of extended π-conjugated donor moiety of polymeric semiconductors can yield a more planar backbone structure and thus enhanced intermolecular interaction which enables more perfect crystalline structure as well as enhanced charge transport behavior. |
| 저자 |
유성훈1, 박광훈2, 김윤희2, 권순기2, 정대성1
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| 소속 |
1대구경북과학기술원, 2경상대 |
| 키워드 |
고분자전자/에너지/광학재료 |
| E-Mail |
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| 원문파일 |
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