高等学校化学研究 ›› 2017, Vol. 33 ›› Issue (2): 227-230.doi: 10.1007/s40242-017-6421-6
Highly Efficient White Organic Light-emitting Devices with Optimized Electron Transporting Layers
ZHANG Tianyu1, ZHENG Yu1, WANG Chengming1, ZHANG Yixin1, LIU Shihao2, MA Jian3, ZHANG Letian2, XIE Wenfa2, CHEN Ping2, LIN Jun1, LIU Yujuan1
- 1. Key Laboratory of Geo-exploration Instruments, Ministry of Education, College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, P. R. China;
2. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, P. R. China;
3. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, P. R. China
Highly Efficient White Organic Light-emitting Devices with Optimized Electron Transporting Layers
ZHANG Tianyu1, ZHENG Yu1, WANG Chengming1, ZHANG Yixin1, LIU Shihao2, MA Jian3, ZHANG Letian2, XIE Wenfa2, CHEN Ping2, LIN Jun1, LIU Yujuan1
- 1. Key Laboratory of Geo-exploration Instruments, Ministry of Education, College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130061, P. R. China;
2. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, P. R. China;
3. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, P. R. China
摘要：
We fabricated three phosphorescent blue organic light-emitting devices based on blue phosphor of iridium(III) bis[(4,6-difluorophenyl)-pyridinato-N,C2'](Firpic) with different electron transporting layer(ETL) materials. By analyzing efficiency curves and spectral characteristics, the significant effect of ETL on many aspects of device performance was demonstrated. With optimized ETL, the characteristics of devices, such as voltage and efficiency were significantly improved. Combined with a yellow phosphor of iridium(III) bis(4-phenylthieno[3,2-c]pyridinatoN,C2') acetylacetonate(PO-01), phosphorescent white organic light-emitting devices(PhWOLEDs) were obtained. Then, with an aim to promote the performance of the PhWOLEDs, a thin layer of 4,4',4″-tri(N-carbazolyl)-triphenylamine(TCTA) was introduced between two light emission layers, and the diffusion of excitons was confined. The outperformance device fabricated with 4,7-diphenyl-1,10-phenanthroline(Bphen) as the electron transporting layer exhibited a peak current efficiency of 36.6 cd/A, a peak power efficiency of 19.2 lm/W, and the International Commission on Illumination coordinates(0.37, 0.46).