In this study, solution-processed blue organic light-emitting diodes (OLEDs) were constructed by employing POBPCz as a bipolar host material with a high triplet of 3.01 eV and 2CzPN as the blue TADF emitter. A maximum EQE of 12.9% was realized in the blue TADF OLEDs, along with a satisfactory CIE coordinate of (0.19, 0.37). These results were among the best ones for the 2CzPN-based solution processed blue OLEDs. Moreover, solution-processed white OLEDs (WOLEDs) with a single-emitting layer were fabricated by Ir(MDQ)₂ (acac) as the orange-red iridium complex. The optimized WOLEDs could achieve a maximum EQE of 12.4%, as well as the stable electroluminescence spectra. Notably, the white-light emission was achieved by the incomplete energy transfer from the blue TADF emitter of 2CzPN to the orange-red emitter of Ir (MDQ)₂ (acac) via Förster energy transfer (FRET) process.

在这项研究中，通过使用POBPCz作为具有高三重态3.01 eV的双极性主体材料和2CzPN作为蓝色TADF发射体的双极性主体材料，构造了溶液处理的蓝色有机发光二极管（OLED）。蓝色TADF OLED的最大EQE为12.9％，CIE坐标为（0.19，0.37）。这些结果是基于2CzPN的溶液处理蓝色OLED的最佳结果之一。此外，通过Ir（MDQ）₂制备了具有单发射层的固溶处理白色OLED（WOLED）。（acac）为橙红色铱络合物。经过优化的WOLED可以实现12.4％的最大EQE，以及稳定的电致发光光谱。值得注意的是，白光发射是通过Förster能量转移（FRET）过程从2CzPN的蓝色TADF发射器到Ir（MDQ）₂（acac）的橙红色发射器的不完全能量转移实现的。