Organic Semiconductor, its Present Status and Upgrade

Abstract

In this article, in order to clarify inherent limitations in the device applications of the organic amorphous semiconductor, its characteristics of charge carrier transport and technical basis of present device applications such as xerographic photoreceptors and organic light emitting diodes, are discussed first. Then, the importance of molecular alignment in the semiconductor materials is pointed out for overcoming the limitations in the conventional organic semiconductors practically used. Finally, the charge carrier transport properties of mesophase materials and their high potential for device applications are discussed as a quality organic semiconductor that exhibits self-organizing molecular alignment.