38.4: Invited Paper: Stack Design of OLEDs with High Performance and Simplified Device Structures

Abstract

The increasingly complex layer structure of commercial OLEDs leads to higher manufacturing costs. In this paper, we demonstrate a simplified device structure with only two layers between the anode and the emissive layer, compared to the usual three or four layers in state‐of‐the‐art devices. The stack is designed so as to ensure efficient hole injection and transport. As a result, the devices achieved longer lifetime than the more complex structure, while maintaining equivalent chromaticity, efficiency and operating voltage. Fewer layers help realize cost‐effective mass production.