| 초록 |
In recent years, polymers and small molecules based on diketopyrrolopyrole(DPP) have been extensively studied in organic solar cells due to its planar structural features. By comparing with the polymers, small molecules have several advantages such as ease of synthesis and purificaion. In this study, we synthesized a series of new donor-acceptor-donor type small molecules based on DPP with different alkyl chains as electron deficient unit and perylene as electron rich unit. The effect of different alkyl chains on optical, electrochemical and photovoltaic properites will be dicussed. Besides, we also investigate change of optoelectrochemical properties by annealing process. |
