Polymers are usually considered as insulators, till the discovery of conductivity in unsaturated polymer polyacetylene due to iodine doping in 1977. This leads to a lot of research activities in the field of conducting polymers. But the demonstration of electroluminescence properties of undoped conjugated polymers in 1991 opened up the possibility of using conjugated polymers in semiconductor devices. After this demonstration, semiconducting polymers and organic materials are of great interest to the scientific community due to its processing ease and tenability in optical, electrical and its biocompatible properties. These materials are widely used alone or in conjunction with other materials in different photonic devices such as photovoltaic’s, light emitting diodes and field effect transistors. The fundamental principle involved in optical and electrical properties of such materials are still a matter of debate. In this aspect, our group tries to understand the optical and electrical properties of this system along with the possibility of making useful devices.