| 초록 |
Over the past decades, π-conjugated polymers have been commonly applied as an active layer for organic photovoltaics (OPVs). Recently, many researches have been focused in small molecules as active layer materials due to their advantages of the ease synthesis and purification. Herein, we synthesized a series of new donor-acceptor type small molecules based on diketopyrrolopyrole (DPP) with different alkyl chain as electron deficient unit and phenyl carbazole as electron rich unit. The ultra-visible spectra showed that the intensity of absorbance increased after annealing processes. Also, the device performances were improved by annealing. In this presentation, we will report the synthesis, opto-electrochemical properties and photovoltaic properties. |
