[17p-PB1-1~15] 12.4 Organic light-emitting devices, organic transistors, and flexible devices

[17p-PB1-13] Positional Isomer Effects in Anthracene Dimers for Upconversion OLEDs

〇(M1)Hayato Kawamoto¹, Hiroto Iwasaki¹, Yutaka Majima¹, Seiichiro Izawa¹ (1.Science Tokyo MSL)

Keywords:

OLED,Upconversion

This study aims to achieve both deep-blue emission and high efficiency in TTA upconversion (UC) OLEDs capable of low-voltage operation. We investigated the effect of linkage positions in diphenylanthracene (DPA) dimer donors and revealed that these positions cause marked differences in device characteristics. Specifically, the meta-linked isomer realized deep-blue emission peaking at 429 nm, while the para-linked isomer delivered the highest external quantum efficiency (EQE). These results demonstrate that the linkage position of the donor significantly modulates both the emission spectrum and efficiency.