| 초록 |
bulk heterojunction (BHJ) organic photovoltaics (OPVs) has attracted much attention in both academia and industry because of their potential application in solar cells via cost-effective solution processes. In designing materials for polymer solar cells it is well established that apart from the chemical structure, which determines the optical band gap and energy levels, the morphology of the photoactive donor−acceptor blend plays a crucial role. benzo[2,1-b;3,4-b']dithiophene (BDP) is well used donor unit in high performance polymers at present. Because it have many advantages which are long π conjugation length, low HOMO level and high charge carrier mobility. Benzo[1,2,5]thiadiazole (BT) is one of the stronger electron withdrawing moieties used widely in PSCs due to a combination of its electron accepting propertie. In this study, we synthesized BDP and BT based copolymer and investigated their PSCs property. |
