【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.更多还原

【Abstract】 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.更多还原