应用交互叠层空穴传输层的高效铕配合物发光二极管  

Efficient Organic Light Emitting Diodes with Europium Complex by Using Alternate Multilayer Hole-transporting Layer

作　　者：魏晗志[1] 李文连[1] 苏文明[1] 李明涛[1] 李斌[1] 洪自若[1] 

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,吉林长春130033

出　　处：《发光学报》2004年第3期329-331,共3页Chinese Journal of Luminescence

基　　金：国家自然科学基金资助项目 ( 90 2 0 10 12 )

摘　　要：制备了铕配合物有机发光二极管 (OLED) ,为了获得Eu(DBM ) 3bath的特征发射 ,在器件中引入BCP作为空穴阻挡层。通过引入交互叠层的TPD m MTDATA作为空穴传输层 ,与传统异质结器件相比 ,最大发光效率及最大发光亮度都有明显提高。其最大发光效率在电流密度为 2 .8mA cm2 时达到 3cd A ,在电流密度为1 70mA cm2 时器件达到最大亮度 6 70cd cm2 。对BCP空穴阻挡层及TPD mRed organic light emitting diodes (OLEDs) emitted from europium (Eu) complex have been fabricated. To get high purity characteristic emissiom from Eu complex,2,9 dimethyl 4,7 diphenyl 1,10 phenanthroline (BCP) was introduced as hole blocking layer. By introducing an alternate multilayer of 4, 4′ bis[N (p tolyl) N phenyl amino]biphenyl (TPD) /1,3,5 tris (3 methylphenylphenylamino) triphenylamine ( m MTDATA) as hole transporting layer which can confines the surplus holes injected from the ITO anode, compared with the conventional heterostructure device, the luminous efficiency and the maximum brightness can be improved significantly, the maximum luminous efficiency and the maximum brightness of the red EL emission are 3 cd/A at the current density of 2.8 mA/cm 2 and 670 cd/m 2 at the current density of 170 mA/cm 2, respectively. The mechanism to improve the red device performance with Eu complex by the AM hole transporting layer and effect of BCP on the emission characte ristic of the devices were also discussed.

关 键 词：有机发光二极管 交互叠层 铕配合物 

分 类 号：TN383.1[电子电信—物理电子学]