有機半導体のグラフォエピタキシー

電子デバイス

日本結晶成長学会誌

Organic semiconductors have attracted much attention as key materials to realize plastic electronics, and thin film transistors (TFTs) using organic semiconductors are present target in this research field. However, randomly oriented polycrystalline films grown on amorphous gate insulator show a much lower carrier mobility than that of single crystals and this is one of the problems to make organic TFTs. To improve the mobility, control of in-plane orientation of the thin films on amorphous substrates is required. In this review, the concept of "graphoepitaxy" is introduced as a way to control the in-plane orientation, and application of graphoepitaxy to organic semiconductor sexithiophene is reported.