高效率白色有机电致发光器件  

High-efficiency White Organic Light-emitting Devices

作　　者：侯晶莹[1] 程刚[1] 赵毅[1] 刘式墉[1] 

机构地区：[1]吉林大学集成光电子学国家重点实验室,吉林长春130023

出　　处：《半导体光电》2004年第6期433-436,共4页Semiconductor Optoelectronics

基　　金：国家自然科学基金资助项目 (60 0 770 1 4;50 0 73 0 0 8) ;吉林省科委资助项目 (2 0 0 2 0 51 8)

摘　　要：　通过引入磷光材料Ir(ppy3)作为敏化剂,制作了高效率的白色有机电致发光器件。Ir(ppy)3和荧光染料DCJTB共掺入CBP母体中。此共掺层的厚度以及浓度都影响到整个器件的效率和颜色。Alq和BCP分别用作电子传输层和激子阻挡层,NPB用作蓝光发光层和空穴传输层。器件的最大效率和亮度分别可以达到9cd/A和12020cd/m2。通过调节掺杂层的厚度以及Ir(ppy)3和DCJTB的浓度,可以得到相当纯正的白光,其色坐标为(0.33,0.32),在10～19V的范围内几乎不随驱动电压的变化而变化。High-efficiency white light-emitting devices are fabricated by introducing phosphorescent material Ir(ppy_3) as sensitizer. Ir(ppy)_3 and the fluorescent dye DCJTB are co-doped into CBP host, whose thickness and concentration influence on both color and efficiency of the devices. Alq and BCP are used as electron-transporting and exciton-blocking layers, respectively, and NPB as a blue light-emitting as well as hole-transporting layer. The maximum efficiency and lumiance of devices are 9 cd/A and 12 020 cd/m^2, respectively. By tuning the concentration of Ir(ppy)_3 and DCJTB, and the thickness of the doping layer, fairly pure white emission with CIE coordinates of (0.33, 0.32) is obtained at 10 V, which is very stable at various biases (10～19 V).

关 键 词：白光器件 磷光敏化剂 有机材料 

分 类 号：TN383.1[电子电信—物理电子学]