Abstract
We investigated the effects of the surface wettability of two polymeric insulators in a 6,13-bis(triisopropylsilylethynyl)-pentacene (TIPS-pentacene) thin-film transistor (TFT). The chemical solvent of TIPS-pentacene was more wettable on a poly(4-vinylphenol) (PVP) insulator than on a poly(vinylidenefluoride-trifluoroethylene) (PVDF-TrFE) insulator. TIPS-pentacene molecules formed large crystals on the PVDF-TrFE layer, resulting in high field-effect mobility for the TFT. In contrast, for the PVP case, the mobility largely varied with the processing temperature of a TIPS-pentacene film. These results demonstrate that the surface wettability of an insulator is important for the crystallization of a solution-processed organic semiconductor and the resulting TFT performance.
| Original language | English |
|---|---|
| Pages (from-to) | 50-56 |
| Number of pages | 7 |
| Journal | Molecular Crystals and Liquid Crystals |
| Volume | 567 |
| Issue number | 1 |
| DOIs | |
| State | Published - 15 Nov 2012 |
Keywords
- Polymeric insulator
- Surface wettability
- TIPS-pentacene
- Thin-film transistor
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