白色有机电致发光器件中多组份电致激基复合物形成及抑制  

Formation and Suppression of Multi-Component Exciplex in White Organic Light Emitting Devices

作　　者：赵江[1] 何志群[1] 张娇[1] 张晓晋[1] 杨柳[1] 孟腾飞[1] 刘淑杰[2] 梁春军[1] 刘姝[2] 

机构地区：[1]北京交通大学光电子技术研究所教育部发光与光信息技术重点实验室,北京100044 [2]国家电光源质量监督检验中心(北京),北京100022

出　　处：《光学学报》2014年第8期261-269,共9页Acta Optica Sinica

基　　金：国家自然科学基金(21174016);教育部博士点专项基金(20120009110031)

摘　　要：从荧光-磷光复合结构的有机电致发光器件的研究入手,采用OXD-7作为蓝色荧光发光层,Ir(MDQ)2acac掺杂在母体材料作为红橙磷光发光层,设计制备了双波段白光有机电致发光器件。研究中发现,OXD-7,Alq3和NPB的三组分协同作用可以导致电致激基复合物的产生,以及由此导致的光谱红移,并使得器件发光效率降低。通过插入TDAF中间层可以有效地抑制激基复合物的产生,同时,通过控制载流子传输的平衡,以及磷光材料的掺杂浓度,可以获得器件发光亮度、效率的提升。A systematical investigation in fabrication of white organic light emitting devices （OLED） in combination of fluorescent and phosphorescent materials is reported. In these devices, OXD-7 as blue layer and Ir（MDQ） 2 acac as a red dopant are doped into host material（s） to make dual-band white OLED. It is discovered that a joint interaction between three components, OXD-7, Alq3 and NPB cause a formation of electroplex in multilayered structure. And a red shift can be observed, which undermines the device performance. This problem can be solved by inserting TDAF as an intermediate layer, which effectively inhibit the electroplex formation and hence eliminate the red shift. Thus, the luminous intensity and efficiency of device are improved.

关 键 词：光电子学 白色有机电致发光器件 激基复合物 荧光 磷光 

分 类 号：TN304[电子电信—物理电子学]