Fabrication and device propenles of high quality organic thin films by magmetic orientation

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Organic semiconductors are currently attracting great attention as a useful material for opto-electronic devices such as light-emitting diodes and field effect transistors. To optimize such device performances, the orientation control of the molecules in the thin film state is very important, because their optical and transportation properties show significant anisotropies To control the molecular orientation, the roles of substrates and growth conditions in physical vapor deposition have been investigated. However, highly oriented thin films of organic semiconductors have not been obtained to date. It is well known that high magnetic field orients organic single crystals. In this study, we aimed at magnetic field as a new parameter of orientation control of organic thin films, and the effects on orientation of some organic semiconductors and self-assembled monolayers were investigated.