We report on the anisotropic properties of solution-processed thin-film transistors (TFTs) fabricated by the vertical flowing of the viscous 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS-pentacene) and isotactic (i-) poly-(methyl methacrylate) (PMMA) blend. During film formation processes, lateral crystalline growth of TIPS-pentacene and TIPS-pentacene/i-PMMA phase-separation were observed. Such anisotropic crystallization of TIPS-pentacene channel caused anisotropic mobility with respect to the channel orientation, so that it could be used for composing of a logic inverter where two TFTs with different channel orientations were serially connected.
Bibliographical noteFunding Information:
The authors acknowledge the financial support from KOSEF (NRL program, No. 2011-0000375), the 21st Century Frontier R&D Program funded by the MKE (Information Display R&D center, F0004022-2011), and Brain Korea 21 Project. H. Cheong thanks the Midcareer Researcher Program through NRF Grant funded by the MEST (No. 2011-0017605).
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Materials Chemistry
- Electrical and Electronic Engineering