Thursday, May 2025

11:00 AM - 11:20 AM

Room: LL20BC

Session: Blue OLED Materials

Delocalizing Electron Distribution in Organic Molecules Towards High-Efficiency, Long-Lifetime Delayed Fluorescence

Invited

• Dongdong Zhang

  Tsinghua University, Department of Chemistry

Description:

Here, we develop TADF emitters with delocalized electron distribution through a secondary acceptor, not only thermodynamically improving the intrinsic molecular stability in both excited and anionic states, but also dynamically fastening the reverse intersystem crossing process for a fast exciton consumption. The targeted compounds as emitters in OLEDs exhibited high maximum external quantum efficiencies of 27.9-37.1% and remarkably long LT95s (times decay to 95% of the initial luminance) of 380 and 648 h for blue and greenish devices at 1,000 cd/m2.