| 초록 |
There were few reports where organic solar cells (OSCs) were processed only by water and ethanol to increase eco-friendliness in fabrication process. Typical organic conducting molecules can never be soluble in water and ethanol, however, by replacing hydrophobic chain of PPDT2FBT & PCBM into oligoethyleneglycol side chain, those materials became soluble in polar solvents. By introducing such materials, it was possible to develop eco-friendly OSCs which achieve PCE over 2%. However, the performance of the eco-friendly OSCs should be further improved. Modifying the fullerene structure can be the key solution for improving the performance of eco-friendly OSCs. There are two problems in previously developed alcohol-soluble fullerenes. Firstly, bulky side chain should be reduced as much as possible. Secondly, the C60 backbone have poor visible light absorption. Herein, we suggest two structures to solve those problems and achieve highly-efficient eco-friendly OSCs. |
