화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.45, No.3, 437-442, May, 2021
DOI10.7317/pk.2021.45.3.437  Export Citation
스핀코팅 시 가속 시간이 폴리티오펜 박막의 결정성장과 전기적 특성에 미치는 영향
Effect of Acceleration Time on the Crystal Growth and Electrical Properties in Polythiophene Thin Film during Spin Coating Process
권은혜, 박소영, 박영돈†
  • 인천대학교 에너지화학공학과
Eun Hye Kwon, So Young Park, and Yeong Don Park†
  • Department of Energy and Chemical Engineering, Incheon National University, Incheon 22012, Korea
E-mail:
초록
본 연구에서는 poly(3-hexylthiophene)(P3HT)을 양용매인 클로로포름과 디클로로벤젠에 각각 용해한 후 스핀코팅 시 회전 속도에 도달하는 시간을 달리하여 박막을 제조하였다. 회전 속도에 도달하는 시간을 1초부터 5초로 다양하게 조절하여 박막제조 시 초기에 형성되는 P3HT 결정 생성량을 증가시켰다. 최종 회전 속도에 도달하는 시간이 1초인 경우에는 초기에 형성된 결정 생성량이 적어서 낮은 결정성의 박막이 제조되었으나 가속 시간이 증가함에 따라 높은 결정화도를 가진 박막이 제조되었다. 가속도뿐만 아니라 용매의 비점에 따라서 분자들의 결정성장이 달라지는 것을 관찰하였다. 그 결과 스핀코팅 시 최적의 공정조건을 선택하여 고분자 박막의 결정화도와 전기적 성능을 획기적으로 향상시킬 수 있었다.
In this study, a thin film was prepared by dissolving poly(3-hexylthiophene) (P3HT) in chloroform and dichlorobenzene, which are good solvents, respectively, and varying the time to reach the rotational rate during spin coating. The time to reach the rotational rate was variously adjusted from 1 to 5 s to increase the amount of P3HT crystals formed at the early stage of thin film fabrication. When the time to reach the final rotational rate was 1 s, a thin film with low crystallinity was produced. The number of crystals formed initially was small, but a thin film with high crystallinity was produced as the acceleration time increased. It was observed that the crystal growth of the molecules was changed depending on the boiling point of the solvent and the acceleration time. As a result, the polymer thin film’s crystallinity and electrical performance could be dramatically improved by optimum process conditions during spin coating.
Keywords:organic thin film transistor;poly(3-hexylthiophene);spin coating;acceleration time
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