| 초록 |
Fluorescent organic light-emitting diode (OLED) has been widely used due to its high color purity, stability and cost-efficiency, but has low electroluminescence (EL) efficiency. Thermally activated delayed fluorescence (TADF)-based OLED enabled using 100% of the excitons, but resulted in broad EL emission with a poor color purity, which can be enhanced by using TADF materials as an assistant dopant and Förster resonance energy transfer (FRET) method. Thus, it is essential to develop the organic dopant with emission having small full-width half maximum (FWHM), which will be utilized with the TADF assistant dopant. Recently, it has been reported that azaacene derivatives show the narrow emission, but are packed in solid state due to its planar part, which means they are quenched. A new azaacene-based fluorophore was synthesized and its molecular design-optical properties will be discussed to induce a narrow emission without aggregation-induced quenching. |
