Fig. 3. Electrical characteristics of the fully inkjet printed OPV cell. (a) Current density vs. voltage characteristics of the cell during illumination by a sun simulator through a mask of 1 cm2 area. Inset: Current density-voltage characteristics measured in the dark. (b) External quantum efficiency (EQE) of the device. The integrated response using a standard reference spectrum results in a JSC of 10.7 mA/cm2