| 초록 |
Polymeric solar cells (PSCs) have attracted considerable attention for their great advantages over existing inorganic solar cells. These days, many low bandgap polymers for solar cells were synthesized. Dihexyl-2H-benzimidazole and carbazole were successful OPVs. Novel conjugated polymer PCBBTHBI based on PCDTBT (poly(N-90-heptadecanyl-2,7-carbazole- alt-5,5-(40,70-di-2-thienyl-20,10,30-benzothiadiazole)) was synthesized. The number molecular weight (Mn) of PCBBTHBI was 12.9 kg/mol, and the polydispersity index (PDI) was 2.6. The spectra of the solid films show absorption bands with maximum peaks at 446457nm. Under white light illumination(AM1.5G,100mW/cm2), PCBBTHBIs:PCBM layers showed VOC of 0.130.23V, JSC of 3.525.69mA/cm2, and FF of 0.360.40, giving PCE of 0.210.47%. |
