Abstract
The first series of works on organic semiconductors were on single component system, and then from 1954, multi-component systems have been developed strongly and to find organic superconductors in 1980. However, multi-component systems have some disadvantageous properties such as air and thermal instability. Therefore, semiconducting single component organic compounds are likely to much more suitable for use as molecular devices. In this article, we propose to construct novel single-component organic semiconductors such as “molecular fastener” type group and also quasi-covalent-type organic semiconductors.
