双发光层结构和双金属电极的绿光微腔OLED  

Green OLED based on double metallic mirrors in microcavity structures and double light--emitting structure

作　　者：安涛[1] 吴俊宇[1] 李朋[1] 杨圣[1] 丁志明[1] Tao An Junyu Wu Peng Li Sheng Yang Zhiming Ding(Department of Electric Engineering, Xi＇an University of Technology, Xi＇an 710048, China)

机构地区：[1]西安理工大学电子工程系,西安710048

出　　处：《光电工程》2017年第3期356-361,共6页Opto-Electronic Engineering

基　　金：国家自然科学基金(61106043)资助项目

摘　　要：制备双金属电极的绿光微腔器件,其结构为Al(15nm)/MoO_3(4nm)/2T-NATA(10nm)/NPB(15nm)/NPB:C545T(x%,20nm)/Alq3:C545T(4%,20nm)/Bphen(35nm)/LiF(1nm)/Al(200nm),其中x为掺杂浓度。实验表明:当掺杂浓度为3%时,器件有最好的光电性能,记为器件B_1。为分析微腔效应,制备基于ITO的参考器件B_2。B_1和B_2色坐标分别为(0.289,0.620)和(0.317,0.557),所以微腔器件的发光颜色更绿。在100mA/cm^2时,器件B_1和B_2的亮度分别为5076cd/m^2和4818cd/m^2,且最大亮度为9277.7cd/m^2,10440cd/m^2;在100mA/cm^2时,器件B_1和B_2的发光效率为6.0cd/A和5.61cd/A,且最大发光效率分别为8.6cd/A和7.97cd/A。与参考器件相比,绿光微腔器件具有更好的发光效率和颜色纯度,其主要归因于微腔效应。Green microcavity organic light-emitting diodes （OLEDs） are fabricated by using double metallic mirrors in microcavity structures and double light-emitting structures. The structure of the device consists of Al（15 nm）/MoO3（4 nm）/2T-NATA（10 nm）/NPB（15 nm）/NPB：C545T（x%, 20 nm）/Alq3：C545T（4%, 20 nm）/Bphen（35 nm）/LiF（1 nm）/AI （200 nm）, where x is the doping concentration. When the doping concentration is 3%, the device has the best pho- toelectric properties, which is named as device B1.The reference device B2 is prepared based on ITO, for the analy- sis of microcavity effect. B1 and B2 CIE are （0.2889, 0.620） and （0.3168, 0.5571）, so the microcavity device could emit more green light. At 100 mA/cm2, the brightness of devices B1 and R2 is 5076 cd/m2 and 4818 cd/m2, and the maximum brightness of the both devices are 9277.7 cd/m2 and 10440 cd/m2. At 100 mAJcm2, luminance efficiency of devices B1 and B2 are 6.0 cd/A and 5.61 cd/A, and the luminance efficiency of the both devices are 8.6 cd/A and 7.97 cd/A. Compared with the reference devices, green microcavity device has a higher current efficiency and better color purity, which attributes to the microcavity effect.

关 键 词：OLED 绿光微腔器件 双发光层结构 双金属电极 

分 类 号：TN31[电子电信—物理电子学]