| 학회 |
한국고분자학회 |
| 학술대회 |
2019년 봄 (04/10 ~ 04/12, 부산컨벤션센터(BEXCO)) |
| 권호 |
44권 1호 |
| 발표분야 |
분자전자 부문위원회 I |
| 제목 |
Effects of the linker unit in naphthalene-diimide-based small molecules on device performances of organic field-effect transistors |
| 초록 |
In this study, we investigated the effects of the linker unit in naphthalene-diimide (NDI)-based small molecules on device performances of organic field-effect transistors (OFETs). Three different chemical units (phenyl, xylene, and bithiophene) were introduced as a rotatable linker between two NDI cores to improve the solubility while maintaining their high field-effect mobility. We found that the crystallinity and molecular ordering of the NDI-based small molecule with a bithiophene linker could be improved by thermal annealing; a moderate annealing temperature of 120 °C appeared to be optimal for promoting self-organization among the small molecules. As a result, the resulting OFETs exhibited evident n-type OFET characteristics with high field-effect mobilities up to 0.016 cm2/Vs (for the NDI-based small molecule with a bithiophene linker) and 0.0426 (for the NDI-based small molecule with a phenyl linker) with high on/off ratios of ~106. |
| 저자 |
오종규1, 하연희2, 박세진3, 권순기2, 김윤희2, 안태규3, 장재영1
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| 소속 |
1한양대, 2경상대, 3한국교통대 |
| 키워드 |
organic field-effect transistors; naphthalene diimide; linker; n-type; small molecules; morphology; crystallinity
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| E-Mail |
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