Enhancing Tandem Organic Light-Emitting Diode Performance with Multiple Electroluminescent Units

Dian Luo, Wei-Yu Chen, Wei-Lun Syu, Shun-Wei Liu, and Chih-Hao Chang

ACS Photonics 2023 10 (8), 2874-2885

DOI: 10.1021/acsphotonics.3c00590

The study introduces four innovative design strategies for tandem organic light-emitting diodes (TOLEDs) to overcome the efficiency loss caused by charge-generation layer (CGL) interactions in multi-layer devices. The designs include an optimized CGL, an exciplex host in the emitting layer for improved carrier balance and reduced voltage, simplified architecture, and nanoparticle diffusers. These led to a three-stacked TOLED reaching 78.7% efficiency, 2.5 times higher than conventional devices. Adding a nanoparticle diffuser further increased efficiency to 123.9%, with a record luminance of 411,531 cd/m². The findings show promise for TOLEDs in OLED phototherapy and display applications with high efficiency and luminance.

How Setfos was used

Setfoswas chosen as the calculation tool for the external optical coupling of the devices.