논문 해외 국제전문학술지(SCI급) Thermal annealing effect on the crack development and the stability of 6,13-bis(triisopropylsilyl ethynyl)-pentacene field-effect transistors with a solution-processed polymer insulator
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2010
- 저자명 J.-H. Bae, J. Park, C.-M. Keum, W.-H. Kim, M.-H. Kim, S.-O. Kim, S. K. Kwon, and S.-D. Lee
- 학술지명 Organic Electronics, 11
- 발행처명 ACS Publication
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 1
홈페이지논문 초록 (Abstract)
Bis(triisopropylsilylethynyl) pentacene (TIPS pentacene) is a functionalized pentacene derivative designed to enhance both the solution solubility and solid-state packing of pentacene. In this paper, we report our observations of a solid-state phase transition in TIPS pentacene crystals upon heating or cooling. Evidence from differential scanning calorimetry (DSC), hot-stage optical microscopy, as well as high-temperature X-ray and electron diffraction are presented. A reasonable match with experimental data is obtained with molecular modeling. Our results reveal that the transition is associated with a conformational reorganization of the TIPS side groups, accompanied by a slight decrease in the acene-to-acene spacing and a shift of the overlap between the neighboring pentacene units. The observed cracking should be avoided or minimized in TIPS pentacene-based thin film transistors to maintain their relatively high charge carrier mobility.