| 초록 |
Recently, donor-acceptor (D-A) type conjugated molecules and polymers displayed promising characteristics in OPVs. In this work, we synthesized diketopyrrolopyrrole (DPP)-based alternating terpolymers bearing different donating units as pyrene and thienyl unit to tune molecular energy levels. These donor units induced fine-tuning of energy level between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) owing to variation of conjugation length, which is useful to develop high-performance polymer solar cells (PSCs). Thermal analysis, absorption spectroscopy and electrochemical analysis were employed to characterize the properties of the polymer. Consequentially, based on the study on charge transport properties, we demonstrated the strong potential in polymer solar cell devices with well-known PCBM as an acceptor. |
