| 초록 |
In order to develop photovoltaic (OPV) materials with favorable electronic properties as well as batch-to-batch consistency, electroactive low bandgap small molecules have recently received special attention as alternatives to polymers. In this work, benzothiadiazole containing small molecules were synthesized and their OPV characteristics were identified. Since the fluorine atom is a strong electron-withdrawing substituent, the introduction of F into the conjugated backbone probably lower both the lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO) energy levels of the conjugated molecules. In this study, the effect of fluorine substitution on molecular packing and π-π stacking interaction in low bandgap small molecules as well as thermal, optical, and electronic properties of the prepared materials will be discussed. |
