| 초록 |
A modified fluorene derivative-based material has been applied for inverted organic solar cell (OSC) devices. Series of Poly[(9,9-bis(3′-((N,N-dimethyl)-N-ethylammonium)-propyl)-2,7-fluorene with different backbone have been synthesized and fabricated as an interlayer for OSC. The materials consist of Poly[(9,9-bis(3’-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt-2,7-9,9-dihexylfluorene)(PFN), Poly[(9,9-bis(3’-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt 4,7-thiophene) (PFN -T), and Poly[(9,9-bis(3’-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt 4,7-dithienyl-2,1,3-benzothiadiazole) (PFN -TBT) are used and studied the their power efficiency. These modified materials improved the electron collection efficiency , reduced the leakage current and enhanced device performances. We found that by coating PFN based material onto the ZnO surface gained high power conversion efficiency of 9% (with a fill factor more than 60%) and the highest PCE (9,41%) among PFN series is achieved in PFN-TBT. |
