| 초록 |
Photovoltaic cells have been a greater attention for the scientists in the past decades, due to the increasing environmental pollution. We report the synthesis and properties of new N-alkyl-2,2′-bithiophene-3,3′-dicarboximide derivatives containing as the acceptor. The polymers have good solubility in common types of organic solvents. HS-5505, HS-5506 and HS-5507 were synthesized by palladium-catalyzed Stille polymerization. The polymers have good thermal stability and good solubility in common types of organic solvents. HS-5505, HS-5506 and HS-5507 containing bithiophene imide units show λmax at 649, 652 and 675 nm. HOMO energy levels at -5.6, -5.5 and -5.7 eV, LUMO energy levels at -3.9, -3.4 and -3.9 eV. The best performance of device with HS-5506:PC61BM layer showed VOC of 0.76 V, JSC of 3.28 mA/cm2, and FF of 0.51, giving the PCE of 1.26%. |
