High Performance Organic Field-Effect Transistors Using cyanoethyl Pullulan (CEP) High- k Polymer Cross-linked with Trimethylolpropane Triglycidyl Ether (TTE) at Low Temperatures
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- Title
- High Performance Organic Field-Effect Transistors Using cyanoethyl Pullulan (CEP) High- k Polymer Cross-linked with Trimethylolpropane Triglycidyl Ether (TTE) at Low Temperatures
- Authors
- Wentao Xu; Chang Guo; Rhee, SW
- Date Issued
- 2013-04
- Publisher
- RSC
- Abstract
- Low-voltage operable organic field-effect transistors (OFETs) were fabricated using a low-temperature curable high-k polymer cyanoethyl pullulan (CEP) as a gate insulator with trimethylolpropane triglycidyl ether (TTE) as a crosslinking agent. With this crosslinking agent, the gate insulators showed low leakage current and a high dielectric constant of 14.8-16, and most importantly, could be cured at low temperatures around 100 degrees C, which is compatible with most plastic substrates for future plastic electronics. The favorable semiconductor-dielectric interface was obtained due to the surface alignment of well-packed pentacene domains, which enabled excellent transistor performance, with one of the highest mobilities around 6 cm(2) V-1 s(-1), an on/off current ratio (I-on/I-off) similar to 10(5), and a steep subthreshold (SS) similar to 0.095 V dec(-1). The high mobility was found to be closely correlated with the surface C equivalent to N dipole density rather than other possibilities, such as dielectric roughness and surface energy. The initial growth of the semiconductors was also studied and correlated with the affecting variables.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/10995
- DOI
- 10.1039/C3TC30134F
- ISSN
- 2050-7526
- Article Type
- Article
- Citation
- Journal of Materials Chemistry C, vol. 1, no. 25, page. 3955 - 3960, 2013-04
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