Bulk Heterojunction Polymer Solar Cells

Polymer solar cell has attracted considerable attention due to its advantages, such as light weight of device, simple process of production, and low-cost fabrication process. Bulk heterojunction polymer solar cell (BHJ-PSC) is one of the device with excellent performance. In this paper, we review the recent progress of the BHJ-PSC. First, we introduce the device structure and the work principle of the BHJ-PSC with the focus on the progress of donor and acceptor material. Furthermore, we discuss several important factors for effecting morphology of the active layer, such as solvents, additives, ratio of donor and accepter, and annealing condition. In addition, tandem cell and inverted cell are also introduced. Finally, the solutions to improve performance of the BHJ-PSC and the application prospects of the BHJ-PSC are presented.