Abstract: In order to improve the energy conversion efficiency of organic solar cells，we propose an optimization scheme for organic solar cells based on double anode interface modification layer． The method mainly uses PTFE and V2O5 as the anode interface modification layer to prepare an organic solar cell with device structure of ITO/PTFE /V2O5 /PCDTBT ∶ PC71BM/LiF /Al． The maximum energy conversion efficiency of organic solar cells with PTFE /V2O5 double anode interface modification layer can reach 6． 52%． Compared with V2O5 single-anode interface modification layer device，it is increased by 11． 5%． The test results show that the work function of the double anode interface modification layer matches with the HOMO level of PCDTBT material，which is conducive to the transmission and extraction of holes． PTFE /V2O5 improves the surface morphology of ITO，reduces the interface defects and inhibits the recombination of carriersat the interface．

Key words: organic solar cells, anode interface modification layer, PTFE, V2O5, photogenerated carriers