This paper reports a viable method for enhancing mobility anisotropy in solution-processed organic thin-film transistors (TFTs) by irradiating linearly polarized ultraviolet (LPUV) light onto a 6,13-bis(triisopropylsilylethynyl)- pentacene (TIPS-pentacene)/poly (vinyl cinnamate) (PVCi) blended semiconductor film. The needle-like crystalline domains in the blended semiconductor film were aligned along the polarization direction of the LPUV light, suggesting that TIPS-pentacene molecules are oriented anisotropically due to an intermolecular interaction and aggregation with the photo-aligned PVCi molecules. The mobility anisotropy reached up to about 50, which is the highest value achieved in solution-processed organic TFTs with a polymeric insulator.
|Journal||Applied Physics Letters|
|State||Published - Jan 7 2013|
Bibliographical noteFunding Information:
This work was supported by the Kyungpook National University Research Fund, 2012. One of the authors (S.D.L.) would like to thank the National Research Foundation of Korea under the Ministry of Education, Science and Technology of Korea for the financial support through the Grant No. 2011-0028422.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)