Abstract: Polymer based organic Solar cell (PSCs) are attractive owing to a number of advantageous features, including their thin-film architecture, low material consumption , their use of organic materials(which are abundant), their utilization of efficient solution processes and low manufacturing energy requirements. Other advantages include their light weight, mechanical flexibility, tunable material properties, high transparency, low material and manufacturing costs. Furthermore, they have a potential to be a major renewable energy source because of their suitability for high-throughput and large area production. In this article, we first give a brief overview of the basic mechanism of polymer-based solar cells, and the recent progress in the device performance based on the development of materials. A single-layer, organic photovoltaics device is proposed that utilize the electrical characteristics of semi-conductive polymers. The important factors such as solvents, temperature and atmosphere are also discussed. Special attention has been given to the characterization methods reported for the DSSCs. Potential future developments and the applications of this technology are also briefly discussed.