Hiroki ARAI, a 2nd-year doctoral student of Kido/Sasabe/Chiba lab, received Student Poster Award of A-COE 2021 at Aichi Institute of Technology. Guanting LIU (D3) also joined the poster presentation at this conference.

Asymmetric Spirobiacridine-based Delayed Fluorescence Emitters for High-performance Organic Light-Emitting Devices, Hiroki Arai, Hisahiro Sasabe,* Hisaki Tsuneyama, Kengo Kumada, Junji Kido*, 13th Asian Conference on Organic Electronics, P-14, Aichi, Japan, Sep. 2nd-4th, 2021. (Student Poster Award)

Abstract: Recently, researchers have focused on thermally activated delayed fluorescence (TADF). Among TADF emitters, a combination of triazine and acridine is a promising candidate for realizing high-efficiency organic light-emitting devices (OLEDs). However, simultaneous development of perfect horizontal orientation (Θ = 100%) and an external quantum efficiency (EQE) of over 40% is still challenging. Here, to obtain insights for further improvements of a triazine/acridine combination, we developed various asymmetric spirobiacridine (SBA)-based TADF emitters. Furthermore, we studied the substitution effects of the triazine acceptor unit on the photophysical properties, including molecular orientations and OLED performance. The corresponding OLED exhibited sky-blue emission with a high EQE of over 30%.
 

📚 Kido/Sasabe/Chiba lab HP >> https://oled.yz.yamagata-u.ac.jp/view.cgi?p=392