Thin film organic solar cells have emerged as a replacement to inorganic solar cells based on
silicon. Organic solar cells offer several advantages compared to silicon-based devices. In the last 10
years, concentrated research attempts towards accomplishing the mandatory power conversion efficiency
of 10 % and environmental stability of the device still remain a main challenge. In order to influence the
efficiency, polymers are frequently utilized to fabricate the absorber and buffer layers. Also, binary and
tenary polymer blends have been devised to influence the performance in micro/nanostructures. In
addition, the advantages of organic solar cells for realistic application, and potential solutions are also
considered