Abstract: The functionalization of phosphorene and its electronic interactions with the conductive polymer had been examined in this research. Edge functionalization of phosphorene is very important because it has been found to be more reactive at the edge of a phosphorene when compared to covalently bonded phosphorus in the zigzag direction. We have described the interaction of phosphorene with polythiophene, a conducting polymer to study its optoelectronic properties and the substituent effect of polythiophene on electronic properties.