| abstract |
The invention discloses an organic solar cell using cyclopentadithiophene derivatives as electron acceptors, which includes a substrate, a cathode, a cathode modification layer, an active layer, an anode modification layer and an anode, wherein the active layer is an electron donor and an anode. A blend film of electron acceptor, the electron donor is PBDB‑T, and the electron acceptor is cyclopentadithiophene derivative DFPCIC. Utilizing the good molecular planarity and suitable energy level structure of DFPCIC, the organic solar cell prepared by the invention has high open-circuit voltage, short-circuit current density and fill factor at the same time, and the highest power conversion efficiency (PCE) is 10.14%. Meanwhile, the organic solar cells based on PBDB‑T:DFPCIC also exhibited excellent thermal stability. In addition, DFPCIC is easy to synthesize, which is beneficial to reduce the cost of organic solar cells. |