In this article, we fabricated photovoltaic devices based on poly(2-methoxy-5(2'-ethyl-hexyloxy)-1,4-phenylenevinylene) (MEH-PPV), as a donor and [ 6,6]-phenyl C-61-butyric acid methyl ester(PCBM) as an electron acceptor materials. The effect of different solvents such as chlorobenzene, o-dichlorobenzene, chloroform, and cosolvent systems prepared with 1:1 ratio of chlorobenzen:o-dichlorobenzene, chlorobenzen: chloroform and o-dichlorobenzene:chloroform on the performance of devices was studied. Further, the effect of a thin electron transport layer of Alq3 inserted between active layer and cathode in the device structure, on the performance of devices was studied with the best solvent.