| 초록 |
In the case of a polymer used as a material for an organic solar cell, the efficiency is determined according to the structural formula. because the structure of the polymer has a influence on the band gap. In this study, the change in the band gap was confirmed by adding Thiophene as a bridge between the push unit and the pull unit. As a result, it was confirmed that the band gap increased as the bridge length increased. PBDT-mFPz, PBDT-T-mFPz, and PBDT-DT-mFPz were synthesized, and the band gap of PBDT-DT-mFPz with the longest bridge was the highest at 1.87. HOMO decreased as thiophene bridge increased. PBDT-DT-mFPz showed the best performance that 5.117mA/cm2 of Jsc, 0.592V of Voc and 1.664 of PCE. |
