Abstract
Research on alternative renewable energy source is of great interest because of increasing world energy demand and depleting non-renewable energy resources. Organic materials consisting of the well-known polycyclic planar aromatic system, pyrene as core, functionalized with different chromophores as arms can be employed as hole transporting materials in various optoelectronic and electronic devices. Moreover this kind of architecture could facilitate the hole injection by tuning the highest occupied molecular orbital (HOMO) energy level. With this aim we designed some of the pyrene oligomers which can be used to fabricate organic electronics devices. A theoretical study of these pyrene oligomers is discussed in this paper.