Abstract: The effects of the substrate temperature on the performance of active layers and characteristics of the polymer solar cells fabricated with doctor-blading were studied. As the substrate temperature increases, the drying time of wet film could be shortened while the large scale aggregation of [6,6]-phenyl C61-butyric acid methyl ester(PCBM) phase could be restrained. Along with the increase of substrate temperature, both the crystallinity of poly(3-hexylthiophene)(P3HT) at the(100) direction and the producing efficiency of the film were increased while the ordering of the π-π stacking was lowered. After annealing, an interpenetrate network was formed in the active layer of the polymer photovoltaic cell and the power conversion efficiency could reach up to 3.93%.

Key words: doctor-blade coating, polymer photovoltaic cells, substrate temperature