阻挡层结构的蓝色有机发光二极管  

Blue Organic Light Emitting Diode with a Blocking Layer

作　　者：朱文清[1] 张步新[1] 蒋雪茵[1] 张志林[1] 许少鸿[1] 

机构地区：[1]上海大学嘉定校区材料系,上海201800

出　　处：《半导体光电》2001年第1期45-47,共3页Semiconductor Optoelectronics

基　　金：国家自然科学基金!重大项目 (5 9790 0 5 0 );国家自然科学基金!项目 (6 96 870 0 2 ) ;上海市教委资助项目

摘　　要：制备了ITO/CuPc/NPB/TPBi/Alq3/MgAg有机发光二极管 ,由于阻挡层TPBi对空穴的阻挡作用 ,器件的电致发光为NPB特征光谱 ,实现了蓝色发光。器件最大亮度和最大流明效率分别为 370 0cd/cm2 和 0 .78lm/W ,CIE色坐标为x =0 .110 ,y =0 .0 85,色度纯正。然而器件显现出较差的稳定性。利用器件的能级结构 ,分析了器件的光学特性和影响稳定性的因素。A blue organic light emitting diode with TPBi as a blocking layer has been prepared. The EL spectrum peak is at 450 nm, indicating that the carrier recombination is confined in the NPB by TPBi layer and light emission originates from NPB. The maximum luminance and luminous efficiency are 3 700 cd/m 2 and 0.78 lm/W, respectively. The CIE coordinates of this diode are x =0.110, y =0.085, showing a good purity for blue OEL display. Luminance and durability characteristics are discussed based on the energy level diagram.

关 键 词：有机电致发光 蓝色发光 阻挡层 稳定性 发光二极管 

分 类 号：TN312.8[电子电信—物理电子学]