title: Photopatternable source/drain electrodes using multiwalled carbon nanotube/polymer nanocomposites for organic field-effect transistors.
abstract: We fabricated photopatternable and conductive polymer/multiwalled carbon nanotube (MWNT) composites by dispersing MWNTs with poly(4-styrenesulfonic acid) (PSS) and poly(acrylic acid) (PAA) in water. PAA enables photo-cross-linking in the composite by adding ammonium dichromate, and PSS assists the dispersion of MWNTs in the composites, leading to higher conductivity. Composite films of PAA/PSS-MWNTs were characterized by conductivities of 1.4-210 S/cm and a work function of 4.46 eV, which could be increased to 4.76 eV during UV photo-cross-linking. By using PAA/PSS-MWNT composites as source/drain electrodes, 6,13-bis(triisopropylsilylethynyl)pentacene field-effect transistors (FET) exhibited a field-effect mobility of 0.101 +/- 0.034 cm(2)/(V s), which is 9 times higher than that of FETs fabricated with gold as source/drain electrodes (0.012 +/- 0.003 cm(2)/(V s)).
authors.affiliation: Polymer Research Institute, Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea.
authors.forename: Kipyo
authors.initials: K
authors.lastname: Hong
authors.forename: Chanwoo
authors.initials: C
authors.lastname: Yang
authors.forename: Se Hyun
authors.initials: SH
authors.lastname: Kim
authors.forename: Jaeyoung
authors.initials: J
authors.lastname: Jang
authors.forename: Sooji
authors.initials: S
authors.lastname: Nam
authors.forename: Chan Eon
authors.initials: CE
authors.lastname: Park