Carrier transport and device applications of the organic semiconductor based on liquid crystalline non-peripheral octaalkyl phthalocyanine

The molecular packing and electronic transport characteristics of mesogenic phthalocyanines having alkyl side chains at non-peripheral sites, 1,4,8,11,15,18,22,25-octaalkylphthalocyanine and its families, are described. These compounds exhibit very high long-range drift mobility up to 1.4 cm2/Vs evaluated by time of flight measurement and must be a candidate of organic semiconductor for printable electronics. We also describe possibilities of application to electronic devices such as solar cells and transistors. In addition, we report on a method for fabricating a highly oriented organic semiconductor thin film utilising latent mesogenic characteristics of the molecules.