[9a-C214-1~11] 12.4 Organic light-emitting devices, organic transistors, and flexible devices

9:30 AM - 9:45 AM JST(12:30 AM - 12:45 AM UTC)

[9a-C214-3] Exciton Management Strategies for Highly Stable Hyperfluorescent OLEDs

〇Youichi Tsuchiya¹, Chihaya Adachi^1,2 (1.OPERA, Kyushu Univ., 2.I2CNER, Kyushu Univ.)

Keywords:

Thermally activated delayed fluorescence,Hyper-Fluolescence,Device durability

The operational stability of HF-OLEDs is considered to be governed by multiple factors, including the accumulation of long-lived triplet excitons on the terminal emitter (TE), triplet energy transfer between the assistant dopant (AD) and TE, and intermolecular interactions. In this presentation, we will report three different strategies for improving the stability of HF-OLEDs: (i) the substituent-position effect of pyrene-modified TEs, (ii) suppression of triplet energy transfer through steric control of substituents, and (iii) MR-HF OLEDs employing MR-TADF materials as both the AD and TE.