Table 4: The efficiency improvement of solar cells with various active layers under condition of 0.1 sun.

SubstrateP3HT:PCBMP3HT:PCBM+N719P3HT:PCBM+N719+GNP
(%) (%)Improvement (%) (%)Improvement (%)

Glass4.14.366.344.7616.1
PI3.273.6812.544.6542.2
PET2.242.386.253.2143.3