2, Universidad Autonoma de Queretaro, Queretaro, , Mexico
Polymer hybrid solar cells has been demonstrated that are an excellent candidates for photovoltaic devices, the polymer solar cells were prepared at room temperature by spin coater technique as the type FTO/TiO2/PTB7:PC70BM:Ag/MoO3, the Ag nanoparticle was synthesized by chemical reduction methodology and the graphene oxide was synthesized by the modified Hummers methodology. The PTB7:PC70BM was dissolved in chlorobenzene with the mixture of silver nanoparticles with 0, 0.5, 1, 3 and 5 wt%. and in the other mixture of graphene oxide of 0, 0.5, 1, 3,and 5 wt%. The homogeneous polymer ink was deposited by spin coater technique on soda lime glass substrate and FTO substrates at 400 rpm. The soda lime polymer substrates were characterized by Hall, Uv-Vis TEM, HRTEM and XRD techniques. The FTO substrates were used for make the devices and were characterized in a solar simulator in order to obtained the efficiency. The resistivity values varied as a function of silver nanoparticles concentration, 1x107 to 1x104 W-cm, the carrier concentration 5x1011 to 7 x1011 cm-3. The best efficiency, was for the device with 1 wt% of silver nanoparticles and 1 wt% of graphene oxide.