Effect of leakage current and shunt resistance on the light intensity dependence of organic solar cells

In this report, we demonstrate that parasitic leakage currents dominate the current voltage characteristics of organic solar cells measured under illumination intensities less than one sun when the device shunt resistance is too low (< 10(6) Omega cm(2)). The implications of such effects on common interpretations of the light intensity dependence of the solar cell open circuit voltage, fill factor, short circuit current, and power conversion efficiency are discussed in detail. (C) 2015 AIP Publishing LLC.