有机薄膜 EL 器件有可能实现大屏幕显并因而受到人们的重视。对于此种材料,发光层内空穴与电子的复合激发了发光材料,因而产生 EL。Tang 等人首先报导了使用空穴输运层将空穴由电极注入到发光层内的方法,采用此种方法可将驱动电压降至几伏。这种器件是有机空穴输运层和发光电子 Organic thin-film EL devices are likely to achieve large-screen display and therefore valued by people. For such a material, recombination of holes and electrons in the light-emitting layer excites the light-emitting material, thereby generating EL. Tang et al. First reported a method of injecting holes from an electrode into a light-emitting layer using a hole transporting layer, and in this way, the driving voltage can be reduced to several volts. This device is organic hole transport layer and light-emitting electrons