[18a-M_B104-1~10] 12.4 Organic light-emitting devices, organic transistors, and flexible devices

11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)

[18a-M_B104-10] Detailed photophysical analysis of HzTFEX₂ with dynamic exciton model

〇Youichi Tsuchiya¹, Hyunje Jung¹, Zachary Hudson², Chihaya Adachi¹ (1.OPERA, Kyushu Univ., 2.UBC)

Keywords:

Thermally activated delayed fluorescence,Comprehensive kinetic analysis,S-T inversion

In 2022, Aizawa et al. reported that HzTFEX₂ has a negative ΔE_ST and the inverse intersystem crossing rate constant is faster than the intersystem crossing rate constant, indicating that it is a material with an S₁ energy lower than T₁. However, this only holds if non-radiative deactivation from T₁ is assumed to be zero. Therefore, we conducted a comprehensive analysis of the thermal behavior of the luminescence decay exhibited by HzTFEX₂ using a dynamical exciton model, which allows for a higher-resolution experimental picture.