| 초록 |
New low-bandgap polymers have been developed over the years to better harvest the solar spectrum. Promising copolymers based on fluorine units have been proposed. However, relatively low hole mobilities were reported for low-bandgap polyfluorene derivatives. Therefore, besides those recent advances, there is still a need for new polymeric materials. In parallel, poly(2,7-carbazole) derivatives have been successfully used in polymer light-emitting diodes (PLEDs) and organic field-effect transistors (OFETs). However, poly(N-alkyl-2,7-carbazole)s generally exhibit poor solubilities and low molecular weights. To solve these problems, bulky side chains are usually attached onto the conjugated backbone. We synthesized the new copolymer with N-9-heptadecanyl-2,7-carbazole, 2,2-dimethylbezimidaz ole by Stille coupling |
