Doctor blade coating technology is a simple,high throughput,and roll-to-roll compatible method for large-area organic solar cell fabrication.Compared to the record efficiencies reported for lab-processed OPV devices with various architectures,the performance of devices produced on a large scale is still at very low levels.Before the fabrication of large scale devices,we have concentrated on the small-area high efficiency PffBT4T-2OD[1~2]and PTB7-Th[3]based organic solar cells using doctor blade technology.