| 초록 |
Polymer solar cells(PSCs) have attracted attentions from industry and academic community for next generation photovoltaic, because of their advantages of easy fabrication, low cost, light-weightiness, and flexibility. The benzo[1,2-b:4,5-b’]dithiophene(BDT) is another 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. To have a BDT's advantages and additional properties, we synthesized the structural isomer of BDT unit that is a benzo[2,1-b;3,4-b']dithiophene(BDP). BDP unit is attractive due to its compact planar structure that could be beneficial to the electron delocalization and improve mobility into various conjugated polymers. Introducing electron withdrawing group 2,1,3-thieno[3,4-b]thiophene (TT) unit is to incorporate chromospheres highly absorbing in visible and near-infrared regions. In this study, we synthesized BDP and TT based copolymer and investigated their PSCs property. |
