Presentation Information
[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.