Interest in organic photovoltaics stems from the potential for low cost solution processing and implementation on flexible substrates.Commercial manufacture of organic solar modules has started, and is poised to increase in the near future.We discuss the trajectory of development of organic photovoltaics and the latest trends in nanomaterials for clean energy production.The use of bulk heterojunction active layers comprising of poly(3-hexylthiophene) (P3HT) as donor, and a fullerene derivative, [6,6]-phenyl C61-butyric acid methylester (PCBM) as acceptor has seen the increase in efficiency or organic solar cells from below 1% in 2001 to more than 8 % ccrtified within one decade.We studied the factors influencing the output characteristics of polymer-fullerene solar cells employing P3HT:PCBM blends as the active layer and suggest ways of improving their performance.We have incorporated CVD synthesized CNTs from aliphatic alcohols in polymer-fullerene devices and report a performance enhancement which could boost the durability and output of these devices.