Tuesday, May 2025

03:00 PM - 03:20 PM

Room: LL20BC

Session: OLED Devices II

Closing the Reliability Gap Between Blue and Green Phosphorescent Organic Light-Emitting Devices Using the Double-Sided Polariton-Enhanced Purcell Effect

Student

• Haonan Zhao

  University of Michigan, Ann Arbor

Description:

Short operational lifetime of blue phosphorescent organic light-emitting diodes (PHOLEDs) is one of the greatest challenges in organic electronics. The polariton-enhanced Purcell (PEP) effect has recently been introduced to extend the lifetime of blue PHOLEDs by reducing the phosphor triplet density, thereby slowing down destructive triplet annihilation processes. Here, we introduce the polariton-enhanced Purcell effect from both the anode and cathode contacts to achieve the 10X absolute device lifetime enhancement in tandem blue PEP-PHOLEDs. With color saturation due to microcavity effects, we show that tandem blue PEP-PHOLEDs achieve a lifetime of 1800 ± 100h, effectively closing the gap between the lifetime of efficient green and deep-blue PHOLEDs.