title: Effect of multi-dimensional ultraviolet light exposure on the growth of pentacene film and application to organic field-effect transistors.
abstract: We report on the multi-dimensional alignment of pentacene molecules on a poly(methyl methacrylate)-based photosensitive polymer (PMMA-polymer) and its effect on the electrical performance of the pentacene-based field-effect transistor (FET). Pentacene molecules are shown to be preferentially aligned on the linearly polarized ultraviolet (LPUV)-exposed PMMA-polymer layer, which is contrast to an isotropic alignment on the bare PMMA-polymer layer. Multi-dimensional alignment of pentacene molecules in the film could be achieved by adjusting the direction of LPUV exposed to the PMMA-polymer. The control of pentacene molecular alignment is found to be promising for the field-effect mobility enhancement in the pentacene FET.
authors.affiliation: School of Electrical Engineering, Seoul National University, Seoul 151-742, Korea.
authors.forename: Jin-Hyuk
authors.initials: JH
authors.lastname: Bae
authors.forename: Sin-Doo
authors.initials: SD
authors.lastname: Lee
authors.forename: Jong Sun
authors.initials: JS
authors.lastname: Choi
authors.forename: Jaehoon
authors.initials: J
authors.lastname: Park