supported by the National Key Basic Research and Development Program of China (2017YFA0204501 and 2020YFA0715000);the National Natural Science Foundation of China (51903137 and 61890942);Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory (XHT2020-005);financial support from the Young Elite Scientist Sponsorship Program (2019QNRC001) by China Association for Science and Technology。
Organic light-emitting diodes(OLEDs)have drawn tremendous attention due to their widespread applications in flat-panel displays and solid-state lightings over the years[1-4].The charge injection is crucial for the per...