Highly efficient white organic light-emitting diodes (WOLEDs) with dual ultra-thin phosphorescent blue and orange emitting layers (EMLs) were achieved in this work. The 1,3-di-9-carbazolylbenzene (mCP) was selected as a carrier-exciton adjusting layer (C-EAL), then the distribution of carriers and excitons was effectively controlled. The investigation of the relationship between C-EAL thickness and spectrum was carried out, and it concluded that the additional C-EAL was beneficial for the suppressing of charge carrier trapping and the decreasing of the direct recombination. Then the improved spectra stability to voltage was also studied. Preferably, the device based on a 4 nm C-EAL exhibits stable Commission Internationale de L'Eclairage (CIE) coordinates from (0.32, 0.40) at 124 cd/m² to (0.30, 0.40) at 9705 cd/m². The device structure and production process here was simplified and compatible with industrial production.

在这项工作中，实现了具有双重超薄磷光蓝色和橙色发光层（EML）的高效白色有机发光二极管（WOLED）。选择1,3-二-9-咔唑基苯（mCP）作为载流子激子调节层（C-EAL），从而有效地控制了载流子和激子的分布。对C-EAL厚度与光谱之间的关系进行了研究，得出的结论是，额外的C-EAL有利于抑制电荷载流子的俘获和减少直接重组。然后，还研究了提高的光谱电压稳定性。优选地，基于4 nm C-EAL的设备在124 cd / m ^{2的条件下}表现出稳定的国际照明委员会（CIE）坐标，其坐标为（0.32，0.40）至9705 cd / m ^2时为（0.30，0.40）。此处的设备结构和生产过程得到了简化，并与工业生产兼容。