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

11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[9a-C214-9] Characterization of the operational dynamics of TADF-based OLEDs by bias-modulated absorption spectroscopy

〇Naoki Nishioka¹, Katsuichi Kanemoto^1,2 (1.Osaka Metropolitan Univ., 2.NITEP)

Keywords:

OLED,spectroscopy,TADF

In the field of OLEDs, the introduction of thermally activated delayed fluorescence (TADF) materials has recently attracted considerable attention because of their potential to improve external quantum efficiency. TADF materials achieve high efficiency by thermally upconverting triplet excitons, which would otherwise be lost through non-radiative deactivation in conventional OLEDs. However, effective measurement techniques for probing the operational processes leading to light emission have not yet been established. In this study, we aimed to directly observe carrier-related information in operating TADF-based OLEDs using operando spectroscopic measurements and to investigate the device operational dynamics through transient spectroscopic analysis.