We report on the development of green and white OLEDs with high efficiency based on Bis(4-(9,9-dimethylacridin-10(9H)-yl) phenyl)methanone (DMAC-BP) manufactured by a facile vacuum evaporation technique via device interfaces engineering. Single, double, and three organic layer undoped OLEDs based on DMAC-BP have been fabricated. Among the developed green devices, the performance of three-layer structured OLEDs is the optimum when mCP (1,3-Bis(carbazol-9-yl)benzene) works as the hole transport layer (HTL) and electron block layer (EBL). The measured maximum external quantum efficiency (EQE), current efficiency (CE), power efficiency (PE), and luminance are 8.1%, 25.9 cd/A, 20.3 lm/W, and 42,230 cd/m², respectively. Importantly, the OLEDs retain the most of their performance at 1000 cd/m², and the EQE, CE, and PE are 7.2%, 23.7 cd/A, and 19.1 lm/W, respectively. The achieved high efficiency is attributed to the bipolar transport characteristics of DMAC-BP and the matched bandgap between HTL and emission layer (EML). In addition, WOLEDs with DMAC-BP as green layer are all warm white devices. Among them, the structure of green-red-blue (device W3) demonstrates the best performance with a maximum EQE and brightness of 4.4% and 7525 cd/m². Our findings will facilitate the great potential applications of undoped TADF emitters, and establish a good foundation for the preparation of high-efficiency and low-cost commercial OLEDs.

我们报告了通过基于装置的便捷真空蒸发技术制造的基于Bis（4-（9,9-methylacridin-10（9H）-yl）苯基）甲酮（DMAC-BP）的高效绿色和白色OLED的开发报告接口工程。已经制造了基于DMAC-BP的单层，双层和三层有机层未掺杂的OLED。在已开发的绿色器件中，当mCP（1,3-双（咔唑-9-基）苯）用作空穴传输层（HTL）和电子阻挡层（EBL）时，三层结构OLED的性能最佳。 。测得的最大外部量子效率（EQE），电流效率（CE），功率效率（PE）和亮度分别为8.1％，25.9 cd / A，20.3 lm / W和42,230 cd / m ²。重要的是，OLED在1000 cd / m ^{2的条件下}仍能保持大部分性能，EQE，CE和PE分别为7.2％，23.7 cd / A和19.1 lm / W。达到的高效率归因于DMAC-BP的双极传输特性以及HTL和发射层（EML）之间的匹配带隙。此外，以DMAC-BP作为绿色层的WOLED都是暖白色器件。其中，绿色-红色-蓝色（设备W3）的结构表现出最佳性能，最大EQE和亮度为4.4％，亮度为7525 cd / m ²。我们的发现将促进未掺杂TADF发射器的巨大潜在应用，并为制备高效，低成本的商用OLED奠定良好的基础。