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.
作者
安涛
吴俊宇
李朋
杨圣
丁志明
Tao An Junyu Wu Peng Li Sheng Yang Zhiming Ding(Department of Electric Engineering, Xi＇an University of Technology, Xi＇an 710048, China)
出处
《光电工程》
CAS
CSCD
北大核心
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
关键词
OLED
绿光微腔器件
双发光层结构
双金属电极
OLED
green microcavity device
double light-emitting layer structure
double metallic mirrors
