| 초록 |
Recently, organic solar cells (OSCs) are attracting a lot of attention due to flexibility, low cost, light weight and large-area applications. Especially, OSCs using small molecules have attracted increasing attentions due to the advantages of small molecules over polymers which include simple synthesis and purification, well-defined structure, high charge carrier mobility and less batch-to-batch variation. In this study, we have synthesized asymmetric structured small molecules with di-(p-tolyl)amine as a donor unit and 2,1,3-benzothiadiazole as an acceptor unit for the organic photovoltaic devices. By changing the end groups attached on the acceptor unit of the molecule, we have investigated on the effect of the different electron withdrawing end groups on the small molecules. Thermal, optical and electrochemical properties of each molecule are measured and photovoltaic devices are successfully fabricated and characterized. |
