[24p-1BC-1~20] 12.3 Functional Materials and Novel Devices

5:30 PM - 5:45 PM JST(8:30 AM - 8:45 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[24p-1BC-15] Anti-Stokes Luminescence in Thermally Activated Delayed Fluorescence Molecules

〇(M2)Shintaro Kohata¹, Hajime Nakanotani^1,2, Chihaya Adachi^1,2 (1.OPERA, Kyushu Univ, 2.I2-CNER, Kyushu Univ)

Keywords:

Anti-Stokes Photoluminescence,Hot-Band Absorption,Thermally Activated Delayed Fluorescence

Thermally Activated Delayed Fluorescence (TADF) molecules are receiving a lot of attention as materials for various applications including organic light-emitting diodes (OLEDs), photocatalysis, X-ray scintillators, and oxygen sensors. In this study, we observed anti-Stokes (AS) luminescence derived from hot band absorption in a series of multi-resonance-type TADF molecules in the visible light region. The TADF molecules exhibited an AS shift of approximately 0.1 eV in the solution state. The AS emission well corresponded to the 1-0 transition from the ground state to the singlet excited state, and we further revealed a correlation between the intensity of AS emission and the intensity of hot band absorption.