title: Multiwall carbon nanotube and poly(3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT:PSS) composite films for transistor and inverter devices.
abstract: Highly conductive multiwalled carbon nanotube (MWNT)/Poly(3,4-ethylenedioxythiophene) polymerized with poly(4-styrenesulfonate) (PEDOT:PSS) films were prepared by spin coating a mixture solution. The solution was prepared by dispersing MWNT in the PEDOT:PSS solution in water using ultrasonication without any oxidation process. The effect of the MWNT loading in the solution on the film properties such as surface roughness, work function, surface energy, optical transparency, and conductivity was studied. The conductivity of MWNT/PEDOT:PSS composite film was increased with higher MWNT loading and the high conductivity of MWNT/PEDOT:PSS films enabled them to be used as a source/drain electrode in organic thin film transistor (OTFT). The pentacene TFT with MWNT/PEDOT:PSS S/D electrode showed much higher performance with mobility about 0.2 cm²/(V s) and on/off ratio about 5 × 10⁵ compared to that with PEDOT:PSS S/D electrode (∼0.05 cm²/(V s), 1 × 10⁵). The complementary inverters exhibited excellent characteristics, including high gain value of about 30.
authors.affiliation: System on Chip Chemical Process Research Center, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Korea.
authors.forename: Dong-Jin
authors.initials: DJ
authors.lastname: Yun
authors.forename: KiPyo
authors.initials: K
authors.lastname: Hong
authors.forename: Se hyun
authors.initials: Sh
authors.lastname: Kim
authors.forename: Won-Min
authors.initials: WM
authors.lastname: Yun
authors.forename: Jae-young
authors.initials: JY
authors.lastname: Jang
authors.forename: Woo-Sung
authors.initials: WS
authors.lastname: Kwon
authors.forename: Chan-Eon
authors.initials: CE
authors.lastname: Park
authors.forename: Shi-Woo
authors.initials: SW
authors.lastname: Rhee
mesh_terms: D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D011137:Polystyrenes / Q000737:chemistry*; D014173:Transistors, Electronic
chemical_list: D019086:Bridged Bicyclo Compounds, Heterocyclic; D037742:Nanotubes, Carbon; D011108:Polymers; D011137:Polystyrenes; C121383:poly(3,4-ethylene dioxythiophene); C003321:polystyrene sulfonic acid