Large-area oranic solar cells with metal electrode
This study examined the effects of the cell area in spray-coated organic solar cells (OSCs) by introducing a metal sub-electrode and grid-electrode to produce large-area cells up to 12.25 cm2. The effects of the cell area were investigated systematically to realize large-area cells. The series resistance could be reduced significantly by inserting a metal grid-electrode onto the indium tin oxide (ITO) anode, yielding a power conversion efficiency of 2.11 % at a cell area of 12.25 cm2 and 2.49 % at an effective photocurrent generated area of 11.23 cm2 under AM.1.5 simulated illumination. This is comparable to the 3.13 % obtained in the cell produced by spray-coating at a cell area of 0.38 cm2.