Fabrication of planarly-oriented polycrystalline thin films of smectic liquid crystalline organic semiconductors

摘要

Organic FETs can be well fabricated with organic crystalline thin films prepared by various techniques including vacuum evaporation and spin-coating techniques, which require vertical orientation of organic semiconductor molecules that favors lateral carrier transport at the channel. On the other hand, planarly-oriented thin films are required in order to fabricate vertical devices such as solar cells and OLEDs with crystalline thin films. However, few techniques have not been established to fabricate well planarly-oriented thin films yet.