报道了一种具有交互穿插界面结构的有机电致发光器件(OELD:organicel ectroluminescent devices),器件以双层结构ITO/NPB/Alq₃/Al为基础,通过改变NPB与Alq₃、Alq₃与Al的界面接触形状,在这两个界面处构造了交互穿插层,从而改变了界面处的电荷分布和有机层中的电场分布,提高了阴极电子注入,平衡了空穴和电子在界面处的数量,增加了激子的形成和复合概率,减小了漏电流。与传统双层结构器件相比,交互穿插界面结构有效地降低了启亮电压,提高了发光效率,而且随着凸凹穿插数量的增加,呈现启亮电压降低,发光效率提高的趋势,同时随着电流密度的增加,交互穿插界面结构器件表现出更稳定的光电性能。利用三缝模板制备的器件e,启亮电压为3V,在电流密度为54mA·cm^-2下,流明效率达到最大值,较传统结构器件a提高34%。

A new type organic electroluminescent device with interinserting interface was fabricated. The basic structure of the device is ITO/NPB/Alq₃/Al. By tailor-made template, the two interinserting interfaces were fabri-cated with NPB/Alq₃and Alq₃/Al,respectively. The charge distribution on the interface and the electric field distribution in the organic layer were changed by introducing interinserting interfaces, thus the electron injection was improved, and the balance of thenumber of the electrons and holes at the interface was obtained. Therefore, the formation probability of exciton was enhanced and the leakage current was reduced. Compared to the traditional two-layer structure devices, the interinserting structure device has lower turn-on voltage and higher luminous efficiency.The driving-voltage of the interinserting structure OELD decreased while the brightness increased with theincrease in the number of the interinsertion. As the current density increased, all the devices with interinserting interface showed high optical-electrical stability. The turn-on voltage of the devicee is 3 V, and was made using the three slots template. At the current density of 54 mA·cm^-2, the device e gets its maximum efficiency, whichis34% higher than the traditional structure device a.