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Effects of the Surface Wettability of a Polymeric Insulator in a Solution-Processed Organic Transistor
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- Authors
- Dong-Wook Kim, Jin-Hyuk Bae, Jong Sun Choi, Jaehoon Park
- Issue Date
- 2012-12
- Citation
- Molecular Crystals and Liquid Crystals, v.567, no.1, pp.50-56
- ISSN
- 1542-1406
- Publisher
- Taylor & Francis
- Language
- English
- Type
- Journal Article
- 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. © 2012 Taylor & Francis Group, LLC.
- KSP Keywords
- 4-vinyl phenol(Poly), Chemical solvent, Organic semiconductors, Organic transistor, PVDF-TrFE, Pentacene film, Polymeric insulator, Processing temperature, Solution-processed, TIPS-pentacene, Thin-Film Transistor(TFT)