Effect of multi-dimensional ultraviolet light exposure on the growth of pentacene film and application to organic field-effect transistors |
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Authors: | Bae Jin-Hyuk Lee Sin-Doo Choi Jong Sun Park Jaehoon |
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Affiliation: | School of Electrical Engineering, Seoul National University, Seoul 151-742, Korea. |
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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. |
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