Abstract
Conjugated polymer solar cells on flexible substrate exhibit many advantages such as the simple processing feasibility for roll-to-roll continuously fabrication、potential to scale up and for large area、lightweight、easy to carry and the extensive application. Therefore, polymer solar cells are under intensive important research. In this study, we use P3HT and PCBM conjugated polymer as absorption material. A better structure called bulk heterojunction by P3HT and PCBM blending system in DCB, and spin-coating on patterned ITO PI and PET flexible substrates. We successfully developed the highest PCE 3.8% on PI substrate of the global research and promote the PCE 13% higher than that was done on the flexible substrate before. In PET substrate series, organic solar cells with microwave annealing show the PCE of 1.51% which is higher than that of the cells with hot plate annealing or non-treatment.