| 초록 |
Bulk-heterojunction(BHJ) type Organic photovoltaics(OPVs) have attracted tremendous attention due to their unique advantages including low cost, light weight, and potential uses in flexible and large-area devices. The Benzo[2,1-b:3,4;b']dithiophene (BDP) unit decreases electron richness of the flanked bithiophene unit, which provides a low-lying highest occupied molecular orbital (HOMO) energy level. The extended π-conjugation length also helps to form highly ordered films that facilitate charge carrier transport. The low-lying HOMO level and the large hole mobilities make BDP-containing polymers particularly attractive for OPVs. Recently research about adjusting length of spacer of the polymer is effective methods for improving Jsc and PCE.In this study, we synthesized polymers using Stille coupling reaction. The synthesized polymer is characterized by 1H-NMR, GPC, TGA, UV, CV and fabricated device was measured. |
