| 초록 |
Organic photovoltaic cells (OPVs) have received considerable attention as renewable energy. High power conversion efficiencies upto 10% were achieved in bulk heterojunction solar cells owing to the development of various donor materials. On the other hands, the fullerene derivatives (eg., (6,6)-phenyl C61-butyric acid methyl ester) showing the large electron affinity and high electron mobility, have been widely used as the electron acceptors despite weak absorption in visible region and long and restricted tuning energy levels. To solve these problems, the development of the non-fullerene acceptors is needed. In this study, we synthesized rhodanine-based small-molecule acceptors, which showed narrow band gaps and red-shifted absorption in the UV-visible spectra. Their optical, electrochemical and photovoltaic properties will be investigated in this presentation. |
