Efficient Solution-Processed OLED Based on Thermally Activated Delayed Fluorescence Dendrimer with Butterfly Molecular Structure

Abstract

Abstract Solution-processed TADF dendrimer based on D-A-D structure has been synthesized, which named POtCz-DPyM. The dendrimers show a small ΔE st. The performance of OLED device shows a relatively low turn-on voltage (4.2 V), the CEmax efficiency of 13.0 cd A−1, the EQEmax of 5.6%. Moreover, the POt modified carbazole was used as the donor to synthesize this novel dendrimer for the first time. And the solution-processed OLED based on POtCz-DPyM as emitter shows high performance among solution-processed devices.