Surface-induced alignment of pentacene by photo-alignment technology for organic thin film transistors
2005; Royal Society of Chemistry; Volume: 15; Issue: 47 Linguagem: Inglês
10.1039/b510731h
ISSN1364-5501
AutoresSung‐Ho Jin, Hwang‐Un Seo, Dong‐Hee Nam, Won Suk Shin, Jung-Hei Choi, Ung Chan Yoon, Jae‐Wook Lee, Jung-Gun Song, Dong-Myung Shin, Yeong‐Soon Gal,
Tópico(s)Conducting polymers and applications
ResumoA series of highly soluble maleimide-based polymers with photoreactive pendant group were synthesized and used as a gate dielectric insulator for organic thin film transistors. Photoalignment properties were characterized by UV-visible spectroscopy and the alignment of liquid crystals. Photopolymerization of polymer-coated organic thin film transistors with linearly polarized UV light induces anisotropy in field-effect mobility. The gate dielectric insulator based on the photoalignable maleimide shows higher field-effect mobility and on/off current ratio than those from a SiO2 gate dielectric insulator with the values of 0.3 cm2 V−1 s−1 and 104, respectively. Our results demonstrate that the photo-induced anisotropy of alignment films to control the molecular order of semiconducting pentacene is a promising technology for improving the performance of organic thin film transistors.
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