| 초록 |
Here we designed and synthesized two new 2D conjugated polymers (P1 and P2) in which 2-ethylhexylselenyl substituted benzodithiophene (BDT-Se) as an electron rich unit and fluorinated benzothiadiazole (BTF) or alkoxy substituted benzothiadiazole (BTO) as electron deficient units respectively. The photophysical properties of the P1 and P2 were characterized via UV-visible absorption spectra, cyclic voltammetry and thermo gravimetric analysis. Both the polymers showed broad absorption window from 300-750 nm with band gaps of 1.6-1.7 eV. Further the new polymers were tested in bulk heterojunction solar cells (BHJ-PSCs) and preliminary tests delivered power conversion efficiencies up to 4.15%, further optimization of device fabrication conditions are under progress. |
