溶液法制备的有机发光二极管(OLED)虽然有着制作成本低、材料利用率高以及容易大规模生产等优势,但是在器件效率上离传统高温真空热蒸镀法制作的OLED还有很大差距。文章基于一种新型的磷光发光材料Ir(tfmppy)_2(tpip),在利用单一主体材料溶液法制备OLED时发现器件效率不高,同时效率滚降很大。为了提高器件效率,同时减小效率滚降,以多种材料混合作为主体材料。通过改变混合主体材料间的比例关系,以一种简单的器件结构,采用溶液法制作出了高效率的OLED器件。其中,以质量比为7∶21∶12的PVK∶mCP∶TCTA为混合主体材料,掺杂质量比为10%的Ir(tfmppy)_2(tpip)作为发光层的器件,取得了高达55cd/A的电流效率。 Organic light-emitting diodes (OLEDs) prepared by solution method have the advantages of low production cost, high material utilization and easy mass-production. However, there is still a long way to go in terms of device efficiency from traditional high-temperature vacuum thermal evaporation processes. Based on a new type of phosphorescent material Ir (tfmppy) _2 (tpip), the device was found to be inefficient at the time of using a single host material solution process and the efficiency was greatly reduced. In order to improve the efficiency of the device, while reducing the roll-off efficiency, a variety of materials mixed as the main material. By changing the proportion of the main body of the mixed material, a simple device structure, the use of solution produced high-efficiency OLED devices. Among them, PVK: mCP: TCTA in a mass ratio of 7:21:12 was used as a host material for a hybrid and a light-emitting layer was doped with 10% by mass Ir (tfmppy) _2 (tpip) Current efficiency.