微腔结构对铕配合物有机电致发光二极管(OLEDs)性能的提高  

Improved Performance of Eu Complex OLEDs with Microcavity Structure

作　　者：孙小燕[1] 李文连[1] 洪自若[1] 陈莉丽[1] 初蓓[1] 吕少哲[1] 李斌[1] 张志强 胡知之 

机构地区：[1]中国科学院长春光学精密机械与物理研究所激发态物理重点实验室 [2]鞍山科学技术大学有机光电子材料研发中心,辽宁鞍山114044

出　　处：《发光学报》2005年第2期262-264,共3页Chinese Journal of Luminescence

基　　金：国家自然科学基金资助项目(90201012)

摘　　要：成功制备了铕配合物的微腔结构有机发光二极管(OLEDs), 其发射层采用质量比为1∶3的空穴传输材料(TPD)和电子传输材料(Eu(DBM)3bath)的混合层。该器件实现了Eu3+高色纯度红光发射,其色坐标为(x=0. 651, y=0. 338);并克服了微腔器件的发光颜色随探测角度增大而变化的缺点。在微腔器件中,最大亮度在19V时达到1 160cd/m2;在高电流密度时的EL效率得到明显提高。Organic light emitting diodes with microcavity structure have been fabricated. Comparing of the optimized cavity and non-cavity devices, the EL performances of cavity device was improved significantly. The pure-red emission of Eu 3+ was observed, and the CIE coordinates were about (x=0.651, y=0.338). Because of the sharp-band emission of Eu 3+ complex, the defect of OLEDs with microcavity structure, causing a blue-shift of emission peak with increasing emission angle, was weakened. The maximum brightness of 1 160 cd/m 2 was achieved at 19 V, and the efficiency was enhanced at high current density.

关 键 词：铕配合物 微腔结构 有机发光二极管 空穴传输材料 

分 类 号：TN312.8[电子电信—物理电子学]