Ultrahigh-luminance organic light-emitting diodes using LiF/MgAg as cathode for the application of both surface emission

ABSTRACT

The effect of different species of cathode on the performance of organic light-emitting diodes under direct current drive has been investigated in this paper. The organic light-emitting diode using LiF/Al and LiF/MgAg layer as cathode has been fabricated, and the luminance of device with cathode structure of LiF/MgAg was found to realize higher efficiency. The performance of the device was found to be improved greatly due to efficient electron injection from MgAg cathode. Moreover, a configuration of LiF/MgAg/IZO (indium zinc oxide) was developed, finding that both the top-emitting intensity and the bottom-emitting intensity achieve very-high luminance, and in this basis, transparent OLEDs with the extremely high-luminance of about 100,000 cd/m² has been realized, which is considered as the highest luminance among the previous works.

KEYWORDS:

• Cathode species
• high-luminance
• organic light-emitting diodes
• transparent

Funding

This work is financially supported by the National Key Research and Development Program of China (No. 2016YFB0401303), the Science and Technology Commission of Shanghai Municipality (No.15590500500 & 16142202900).