| 초록 |
Solution-processed organic photovoltaic (OPV) devices offer a cost-effective approach to future renewable energy technology. However, there are still obstacles to accomplish high power conversion efficiencies (PCE) in OPVs because of the mismatch between the solar spectrum and the spectra of the organic materials used in active layer. To overcome this absorption limitation, synthesizing new low band gap materials is essential to improve PCE of organic solar cells. To this aim, three low band gap molecules consist of D (electron-donating unit) and A (electron-accepting unit) alternative structure were newly designed and synthesized. In this work, we have prepared A-D-A type small molecules with low bandgap, and their optical and electrochemical properties along with their application to actual OPV devices were investigated. |
