| 초록 |
Systematic control of the chemical structure of conjugated polymers is critically important to elucidate the relationships between the conjugated polymer structures and properties and to optimize their performance in bulk heterojunction (BHJ) polymer solar cell (PSC) devices. In specific, the introduction of nitrogen atoms into the polymer backbone caused the increase in planarity of the main chain conformation and thus, optical, electrical, and photovoltaic properties of the conjugated polymers were enhanced. To apply this concept to low bandgap polymers for further enhancement of photovoltaic performance, three different diketopyrrolopyrrole-based polymers were set as target materials. At first, a reference polymer, PDPPTPT, was successfully synthesized and showed the power conversion efficiency of 4.81% when the PSC devices consisting of PDPPTPT:PC61BM were fabricated. The further research about the planarity-controlled low bandgap polymers will be addressed. |
