| 초록 |
Small molecules do not suffer from batch to batch variations, broad molecular-weight distributions, end-group contamination, or difficult purification methods, which can be significant problems for polymeric materials. Pyrrolo[3,4-c]pyrrole-1,4-diones (DPP) has advantage because of Low band gap and strong π-π interaction, but there is disadvantage; poor solubility and film forming ability. So we were synthesized novel acceptor small molecule based on pyrrolo[3,2-b]pyrrole-2,5-diones. Pyrrolo[3,2-b]pyrrole-2,5-diones is expected to improve solubility, changed atoms position and extending π-conjugation. And Recently, poly(2,7-carbazole) derivatives have proven to be good candidates for the design of high hole carrier mobility with optimized HOMO and LUMO energy levels allowing to reach for the first time a certified PCE close to 6%. Therefore novel acceptor small molecule based on pyrrolo[3,2-b]pyrrole-2,5-diones and carbazole was synthesized by stille coupling. |
