[16p-K404-1~11] 12.4 Organic light-emitting devices and organic transistors

2:00 PM - 2:15 PM JST(5:00 AM - 5:15 AM UTC)

[16p-K404-5] Rate constant prediction and its application to MR-TADF emitters

〇Katsuyuki Shizu¹, Hironori Kaji¹ (1.Kyoto Univ.)

Keywords:

OLED,rate constant,MR-TADF

The emission process is a complex phenomenon involving multiple vibronic transitions, making it crucial to elucidate its mechanism and predict its characteristics. Theoretical analysis of an MR-TADF material, BNSS, revealed that delayed fluorescence occurs through a complex pathway involving the T₂ state. Furthermore, analysis of a molecule where sulfur (S) in BNSS was replaced with tellurium (Te) (BNTeTe) suggested that the heavy atom effect of Te accelerates the reverse intersystem crossing without negatively affecting other photophysical properties.