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

Abstract Solution-processed TADF dendrimer based on D-A-D structure has been synthesized, which named POtCz-DPyM. The dendrimers show a small Δ E st . The performance of OLED device shows a relatively low turn-on voltage (4.2 V), the CE max efficiency of 13.0 cd A −1 , the EQE max 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.