Abstract
Herein, a series of materials (BTD-PXZ, BTD-PTZ, and BTD-DMAC) were designed and synthesized with the merit of the facile synthesis process, high synthesis yield, and small molecular weight through directly connecting electron donor to position 5 of benzo[c][1,2,5]thiadiazole (BTD) rather than adopting extensive conjugated structure strategy. The thermally activated delayed fluorescence property of BTD-PXZ was proven and the photophysical characteristics were discussed through the single crystal, computational simulation, and photophysical experiments. The doped organic light-emitting diode with the BTD-PXZ as the emissive layer shows an emitting peak of 620 nm, Commission Internationale de L'Eclairage coordinate of (0.65, 0.25), and external quantum efficiency of 2.4%.
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