Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 3, Pages 2767-2775Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b14778
Keywords
inverted organic light-emitting diodes; white OLED; ZnO; light outcoupling; energy level tuning
Funding
- Ministry of Science and Technology of China [2014CB932600, 2016YFB0401002]
- National Natural Science Foundation of China [61520106012, 91433116, 61522505, 11474214]
- Jiangsu Science and Technology Department [BK20140053]
- Qing Lan Project, Bureau of Science and Technology of Suzhou Municipality [SYG201525, ZXG201422]
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions
Ask authors/readers for more resources
Inverted organic light-emitting diode (OLED) has attracted extensive attention due to the demand in active-matrix OLED display panels as its geometry enables the direct connection with n-channel transistor backplane on the substrate. One key challenge of high-performance inverted OLED is an efficient electron-injection layer with superior electrical and optical properties to match the indium tin oxide cathode on substrate. We here propose a synergistic electron injection architecture using surface modification of ZnO layer to simultaneously promote electron injection into organic emitter and enhance out-coupling of waveguided light. An efficient inverted white OLED is realized by introducing the nanoimprinted aperiodic nanostructure of ZnO for broadband and angle independent light out-coupling and inserting an n-type doped interlayer for energy level tuning and injection barrier lowering. As a result, the optimized inverted white OLEDs have an external quantum efficiency of 42.4% and a power efficiency of 85.4 lm W1-, which are accompanied by the superiority of angular color stability over the visible wavelength range. Our results may inspire a promising approach to fabricate high-efficiency inverted OLEDs scale display panels.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available