| 학회 |
한국고분자학회 |
| 학술대회 |
2018년 봄 (04/04 ~ 04/06, 대전컨벤션센터) |
| 권호 |
43권 1호 |
| 발표분야 |
분자전자 부문위원회 I |
| 제목 |
Fine molecular tuning of diketopyrrolopyrrole-based polymer semiconductors for efficient charge transport |
| 초록 |
To improve the charge carrier mobility of diketopyrrolopyrrole (DPP) donor-acceptor copolymer semiconductors, the length of the donor building block is controlled using vinylene moieties, and its effects on crystalline structure and charge transport are systematically studied. We synthesize DPP-TBT with two vinylene linkages between thiophene units and compare it with DPP-TVT with single vinylene linkage. The increased conjugation length of DPP-TBT are proved by the increased free exciton bandwidth extracted from UV-vis absorption spectra and the wavenumber shift of the C–C peaks to higher values in Raman spectra. From 2D-GIXD studies, it is turned out that the paracrystalline disorder is lower in DPP-TBT than in DPP-TVT. By measuring the temperature-dependence of the charge carrier mobilities, it is turned out that the activation energy for charge hopping is lower for DPP-TBT than for DPP-TVT. |
| 저자 |
유성훈1, 박광훈2, 김윤희2, 정대성1, 권순기1
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| 소속 |
1대구경북과학기술원, 2경상대 |
| 키워드 |
Conjugation structure; charge transport; diketopyrrolopyrrole; molecular tuning
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| E-Mail |
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