Effect of Fluorination Position on the Crystalline Structure and Stre…
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논문명 | Effect of Fluorination Position on the Crystalline Structure and Stretchability of Intrinsically Stretchable Polymer Semiconductors |
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저자 | Hyerin Shin, Yejin Kim, Mingi Sung, Hyungju Ahn, Hyeonjin Yoo, Kwang Hyun Park, Sung Ho Song, Junghoon Lee and Byoung Hoon Lee |
저널명 | ACS MACRO LETTERS |
게재년월 | 2023/11/6 |
Vol. pp |
A clear understanding of the structure−property relationship of intrinsically stretchable polymer semiconductors (ISPSs) is essential for developing high-performance polymer-based electronics. Herein, we investigate the effect of the fluorination position on the crystalline structure, charge-carrier mobility, and stretchability of polymer semiconductors based on a benzodithiophene-co-benzotriazole configuration. Although four different polymer semiconductors showed similar field-effect mobilities for holes (μ ≈ 0.1 cm2 V−1 s−1), polymer semiconductors with nonfluorinated backbones exhibited improved thin-film stretchability confirmed with crack onset strain (εc ≈ 20%−50%)over those of fluorinated counterparts (εc ≤ 10%). The enhanced stretchability of polymer semiconductors with a nonfluorinated backbone is presumably due to the higher face-on crystallite ratio and π−π stacking distance in the out-of-plane direction than those of the other polymer semiconductors. These results provide new insights into how the thin-film stretchability of polymer semiconductors can be improved by using precise molecular tailoring without deteriorating electrical properties.