| 학회 |
한국고분자학회 |
| 학술대회 |
2022년 봄 (04/06 ~ 04/08, 대전컨벤션센터) |
| 권호 |
47권 1호 |
| 발표분야 |
분자전자 부문위원회 |
| 제목 |
Effect of Chalcogenophene Comonomer Substitution on Optoelectrical Properties of Cyclopentadithiophene-based Copolymers for Organic Field-effect Transistors |
| 초록 |
We report the effect of incorporating chalcogenophene comonomers, namely furan (Fu), thiophene (Th), and selenophene (Se), in cyclopentadithiophene (CDT)-based polymers on their optoelectrical properties for organic field-effect transistors (OFETs). The optical, electrical, and morphological properties of these polymers are investigated. Compared to the other polymers, the Th-polymer showed the highest crystallinity with the lowest π-π stacking distance (dπ-π ≈ 3.58 Å) and the highest crystalline length (Lc ≈ 40 Å), confirmed by two-dimensional grazing incidence wide-angle X-ray diffraction (2D GIWAXD). However, the highest hole mobility was obtained from the Se-polymers (μ = 0.25 cm2/V-s), which is higher than Fu-polymer (μ = 0.06 cm2/V-s) and Th-polymer (μ = 0.20 cm2/V-s). We attribute lower mobility of Th-polymer to its island-like crystalline domains confirmed by atomic force microscopy results. Our results suggest a new design rule for developing high-mobility π-conjugated polymers. |
| 저자 |
유현진1, 성민기2, 유다현1, 안형주3, 박가연1, 이정훈2, 이병훈1
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| 소속 |
1이화여자대, 2동서대, 3포항가속기(연) |
| 키워드 |
semiconducting polymers; comonomer substitution; chalcogenophene; benzothiadiazole; organic field-effect transistors
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| E-Mail |
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