| 초록 |
Polymer solar cells(PSCs), generally based on the bulk-heterojunction(BHJ) concept, have attracted tremendous attention due to their unique advantages including low cost, light weight, and potential applications in flexible and large-area devices. 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 broad π-conjugation length, low HOMO level and high charge carrier mobility. To have a BDT's advantages and additional properties, we synthesized a structural isomer of BDT that is a benzo[2,1-b;3,4-b']dithiophene(BDP). The BDP has a improved planarity with a fused aromatic structures. It helps to form highly ordered films that facilitate charge-carrier transport. For that reasons, we introduced BDP derivative as a donor material and synthesized conjugated polymer via Stille coupling reaction. The synthesized polymer showed different properties compared with BDT based polymer. To demonstrate this effects, the polymer was characterized optical, electrochemical and photovoltaic properties, respectively. |
