阴极材料对聚合物发光二极管特性的影响  

Impact of the Cathode Materials on the Performance of Polymer Light-emitting Devices

作　　者：许怡赦[1] 陈国鼎[1] 周金运[1] 

机构地区：[1]广东工业大学应用物理系,广东广州510520

出　　处：《广东工业大学学报》2004年第2期12-15,共4页Journal of Guangdong University of Technology

基　　金：广东工业大学青年基金资助项目(022031)

摘　　要：报道了基于聚(9,9 二辛基芴 4,7 二噻基苯并二唑)(PDOF DBT,m(DOF):m(DBT)=85:15)的双层聚合物发光二极管(PLEDs)在使用碱金属、碱土金属和绝缘材料为阴极时表现的各种特性.当以厚度为3nm左右的Ba作为阴极时,器件表现出较好的性能:外量子效率为1.6%,最大的发光亮度接近4000cd m2.结果表明PDOF DBT与这种阴极的交界面具有较好的能级匹配以及电荷注入平衡.Double-layer polymer light-emitting devices (PLEDs),based on poly(9,9-dioctylfluoren-4,7-di-2-thienyl-2,1,3-benzothiadiazole)(PDOF-DBT,m(DOF):m(DBF)=85:15),using alkaline metals, alkaline earth metals and insulated materials as the cathode,show different characteristics. Device with Ba(a thickness of about 3nm) as cathode shows better performance:the external quantum efficiency is 1.6%, and the highest light intensity is close to 4000cd/m^2.The result demonstrates the interface between PDOF-DBT and this kind cathode with good energetic contact, and electron-injecting equilibrium.

关 键 词：聚合物 发光二极管 阴极材料 碱土金属 绝缘材料 

分 类 号：TN311[电子电信—物理电子学]