Thin-Film Transistors Based on Copper Phthalocyanine Deposited on a Gate Dielectric Rubbed with Poly(tetrafluoroethylene)

摘要

surface. For the surface of the substrate with the alignment layer, a water droplet for water contact measurement exhibited anisotropy. Furthermore, the field-effect mobilities of CuPc TFTs depended on the the angle between the rubbing direction and the conduction direction of the channel carrier. The mobility for 0° has the highest value in the TFTs with a PTFE alignment layer. The difference between the mobilities of TFTs for 0° and without an alignment layer is not clear because of the large variation in the mobility of TFT for 0°. The variation of the alignment layer may cause the variation in the mobility. However, two TFTs for 0° had high mobilities as compared to those of TFTs without an alignment layer. This result suggests that improvement in reproducibility of a PTFE alignment layer enhance the mobility of TFTs with the alignment layer.