| 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. It needed to design conjugated polymers with high efficiency. The 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 naphtodithiophene(NDT). The NDT has improved planarity and expanded conjugation length with a fused diphenyl rings. It helps to form highly ordered films that facilitate charge-carrier transport. So we introduced NDT 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 polymers were characterized optical, electrochemical and photovoltaic properties, respectively. |
