Investigation on the Effect of Applying Different Structures on OLED Devices to Its Performance and Quality

Abstract

OLED is a kind of device that contains multiple organic layers to produce electroluminescence. OLED has the benefit such as the easy process of manufacturing and only needs a low driving voltage which is environmentally friendly. OLED has low thickness and it doesn’t cost a lot of power compared with LED. By making it as a screen, it can be flexible and have a high capability to emit high light intensity. In this case, more and more experts and enterprises are developing and investigating more in this field. Nowadays, OLED is widely used in the manufacture of foldable screen on mobile phones. Besides, OLED still has a huge room to improve. The external quantum efficiency (EQE), which is the ratio of electrons collected to the incident photons, was well acknowledged to be a good indicator for researchers to evaluate the performance in OLED devices. Due to the difficulties on significant improvement on materials used to make OLED, experts put their effort on designing better structures for OLED to increase its percentage EQE. Therefore, in this work, the performance of OLED devices with different structures were compared.