| 학회 |
한국고분자학회 |
| 학술대회 |
2013년 봄 (04/11 ~ 04/12, 대전컨벤션센터) |
| 권호 |
38권 1호 |
| 발표분야 |
대학원생 구두발표(발표10분) |
| 제목 |
Correlation between Thermodynamic Behavior and Thin-Film Structure for Blends of Small-Molecule and Polymeric Organic Semiconductors |
| 초록 |
Electronic properties of physical mixtures of organic semiconductors are strongly affected by their morphology. Here, the thermal behavior, intermixing and thin film structure were investigated for blends of a semiconducting small-molecule BTD-DTP with the electron-accepting polymer PNDI-2T. X-ray scattering and scanning probe microscopy of thin films of varying composition show an increase in the BTD-DTP crystalline phase and reduction in the crystallite orientation distribution, as the ratio of BTD-DTP reaches 50 wt%. The domain sizes of the BTD-DTP and PNDI-2T crystalline phases reach a minimum at the 50 wt% as well, suggesting the phase formation leads to mutual limitation of their crystalline domain size. Comparison of the bulk and thin film properties shows a divergence in behavior of the small molecule, which in the bulk exhibits only a monotonic decrease in melting point with addition of polymer, but which has an increase in crystallinity from 20 to 50 wt% PNDI-2T content. |
| 저자 |
김경태1, Benjamin H. Wunsch2, 노예철1, 안병철1, 정성민1, Lauren E. Polander2, David G. Bucknall2, Seth R. Marder2, 이문호1
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| 소속 |
1POSTECH, 2Georgia Institute of Technology |
| 키워드 |
Organic semiconductors; thin film morphology
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| E-Mail |
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