| 초록 |
The molecular design with highly ordered structure in polymer solar cells (PSCs) is shown to play an important role in device performance. Donor-acceptor (D-A) copolymer have been proved to be excellent candidates for efficient PSCs. The benzo[1,2-b;3,4-b']dithiophene (BDT) is well used donor unit in high performance polymers at present. Because it have many advantages which are extended conjugation length, low HOMO level and high charge carrier mobility. To have a the advantages and enhacned propeties of BDT, we synthesized the structural isomer of BDT that is a benzo[2,1-b;3,4-b']dithiophene (BDP). The BDP polymer has a better planarity and charge carrier mobility than BDT-based polymer. Using a BDP derivative as a donor and the computational simulation, the newly designed D-A polymer have better predicted performances with highly ordered structure. |
