| 초록 |
All-polymer solar cell (all-PSC) is a powerful candidate as a commercializing format of organic solar cells, due to its strong flexibility and long-term stability. Those advantages over ITIC or PCBM-based small molecule systems are key driving factors to develop all-PSC systems. Among various all-PSC systems, benzodithiophene (BDT) structure is well-known as a promising constructing unit for highly efficient polymer donor. In this study, we synthesized a series of BDT-based donor polymers with modified side chains to tailor the energy level, light absorption ability and solubility of resulting polymers. We introduced sulfur, and silicon atoms to the side chain of BDT units, and also modified the length of aliphatic chains to precisely control the properties of synthesized polymers. We observed energy level shifts, controlled solubility and optical properties which are strongly related to photovoltaic properties of all-PSC devices using synthesized polymers. |
